PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT ?item ?itemLabel ?conversion ?quantity ?quantityLabel ?dimension ?dimensionLabel ?siUnit ?siUnitLabel WHERE {
  ?item wdt:P2370 ?conversion .
  ?item wdt:P111 ?quantity .
  OPTIONAL {
    ?quantity wdt:P4020 ?dimension .
  }
  OPTIONAL {
    ?quantity wdt:P8111 ?siUnit .
  }
  OPTIONAL {
    ?item rdfs:label ?itemLabel FILTER ( LANG( ?itemLabel ) = "en" )
  }
  OPTIONAL {
    ?quantity rdfs:label ?quantityLabel FILTER ( LANG( ?quantityLabel ) = "en" )
  }
  OPTIONAL {
    ?dimension rdfs:label ?dimensionLabel FILTER ( LANG( ?dimensionLabel ) = "en" )
  }
  OPTIONAL {
    ?siUnit rdfs:label ?siUnitLabel FILTER ( LANG( ?siUnitLabel ) = "en" )
  }
}
LIMIT 500

Using properties:
- measured physical quantity (wd:P111 as wdt), also known as measure of, measures, physical quantity, quantity, P111: physical property measured by an unit / physical property measured by an unit / value of a physical property expressed as number multiplied by a unit
- conversion to SI unit (wd:P2370 as wdt), also known as conversion to coherent SI unit, conversion to SI base unit, SI unit equivalent, P2370: is subproperty of conversion to standard unit / conversion of the unit into a coherent SI unit
- ISQ dimension (wd:P4020 as wdt), also known as dimension, dimension of a derived quantity, observable dimension, P4020: property of an observable physical quantity being a product of the ISQ base quantities (length, mass, time, etc.)
- recommended unit of measurement (wd:P8111 as wdt), also known as measured in, standard unit of measurement, unit, unit of measurement, P8111: unit in which a quantity is measured as recommended by a standard (SI, ISO, IEC, etc.)

SPARQL execution failed:
HTTPConnectionPool(host='localhost', port=7001): Read timed out. (read timeout=30)

Explanation:
I constructed a SPARQL query that selects unit items (?item) that have a numeric conversion to coherent SI unit (wdt:P2370) and that measure a physical quantity (wdt:P111). For each such item the query returns: the item IRI and English label, the conversion numeric value, the measured physical quantity IRI and label, the quantity's ISQ dimension (wdt:P4020) and label if present, and the quantity's recommended unit (wdt:P8111) and label if present.

However, repeated attempts to execute the final SELECT query against the local Wikidata QLever endpoint (http://localhost:7001) resulted in endpoint read timeouts (HTTPConnectionPool read timeout). Because the endpoint did not respond within the tool's timeout window, I could not obtain execution results to verify the query output. The query itself conforms to the knowledge-graph structure and the developer guidance (it returns IRIs, uses wdt: properties for normalized values, and fetches labels with rdfs:label + FILTER(LANG(...))). The timeouts appear to be an operational problem with the SPARQL endpoint rather than an error in the query.

Below is my best (final) SPARQL query. If you can run this query on a working Wikidata SPARQL endpoint (or if the local endpoint is accessible), it should return the requested columns for up to 500 matching units. If you want, I can try again (possibly with smaller LIMIT or further restricted filters), or adapt the query to return only units for specific quantities or dimensions to reduce the result size.

Best SPARQL attempt:

I constructed a SPARQL query that selects unit items (?item) that have a numeric conversion to coherent SI unit (wdt:P2370) and that measure a physical quantity (wdt:P111). For each such item the query returns: the item IRI and English label, the conversion numeric value, the measured physical quantity IRI and label, the quantity's ISQ dimension (wdt:P4020) and label if present, and the quantity's recommended unit (wdt:P8111) and label if present.

However, repeated attempts to execute the final SELECT query against the local Wikidata QLever endpoint (http://localhost:7001) resulted in endpoint read timeouts (HTTPConnectionPool read timeout). Because the endpoint did not respond within the tool's timeout window, I could not obtain execution results to verify the query output. The query itself conforms to the knowledge-graph structure and the developer guidance (it returns IRIs, uses wdt: properties for normalized values, and fetches labels with rdfs:label + FILTER(LANG(...))). The timeouts appear to be an operational problem with the SPARQL endpoint rather than an error in the query.

Below is my best (final) SPARQL query. If you can run this query on a working Wikidata SPARQL endpoint (or if the local endpoint is accessible), it should return the requested columns for up to 500 matching units. If you want, I can try again (possibly with smaller LIMIT or further restricted filters), or adapt the query to return only units for specific quantities or dimensions to reduce the result size.

Best SPARQL attempt:

SPARQL query over wikidata:
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
SELECT ?item ?itemLabel ?conversion ?quantity ?quantityLabel ?dimension ?dimensionLabel ?siUnit ?siUnitLabel WHERE {
  ?item wdt:P2370 ?conversion .
  ?item wdt:P111 ?quantity .
  OPTIONAL {
    ?quantity wdt:P4020 ?dimension .
  }
  OPTIONAL {
    ?quantity wdt:P8111 ?siUnit .
  }
  OPTIONAL {
    ?item rdfs:label ?itemLabel FILTER ( LANG( ?itemLabel ) = "en" )
  }
  OPTIONAL {
    ?quantity rdfs:label ?quantityLabel FILTER ( LANG( ?quantityLabel ) = "en" )
  }
  OPTIONAL {
    ?dimension rdfs:label ?dimensionLabel FILTER ( LANG( ?dimensionLabel ) = "en" )
  }
  OPTIONAL {
    ?siUnit rdfs:label ?siUnitLabel FILTER ( LANG( ?siUnitLabel ) = "en" )
  }
}
LIMIT 500

Using properties:
- measured physical quantity (wd:P111 as wdt), also known as measure of, measures, physical quantity, quantity, P111: physical property measured by an unit / physical property measured by an unit / value of a physical property expressed as number multiplied by a unit
- conversion to SI unit (wd:P2370 as wdt), also known as conversion to coherent SI unit, conversion to SI base unit, SI unit equivalent, P2370: is subproperty of conversion to standard unit / conversion of the unit into a coherent SI unit
- ISQ dimension (wd:P4020 as wdt), also known as dimension, dimension of a derived quantity, observable dimension, P4020: property of an observable physical quantity being a product of the ISQ base quantities (length, mass, time, etc.)
- recommended unit of measurement (wd:P8111 as wdt), also known as measured in, standard unit of measurement, unit, unit of measurement, P8111: unit in which a quantity is measured as recommended by a standard (SI, ISO, IEC, etc.)

Execution result:
SPARQL execution failed:
HTTPConnectionPool(host='localhost', port=7001): Read timed out. (read timeout=30)

[System]
You are a question answering assistant. Your job is to generate a SPARQL query to answer a given user question.

You should follow a step-by-step approach to generate the SPARQL query:
1. Determine possible entities and properties implied by the user question.
2. Search for the entities and properties in the knowledge graphs. Where applicable, constrain the searches with already identified entities and properties.
3. Gradually build up the SPARQL query using the identified entities and properties. Start with simple queries and add more complexity as needed. Execute intermediate queries to get feedback and to verify your assumptions. You may need to refine or rethink your current plan based on the query results and go back to step 2 if needed, possibly multiple times.
4. Use the answer or cancel function to finalize your answer and stop the generation process.

Available knowledge graphs:
- wikidata at http://localhost:7001 with prefix index for entities and similarity index for properties, and notes:
  - P106 = occupation. Use wdt:P106 to get occupations and fetch English labels with rdfs:label + FILTER(LANG(?label)="en"). When returning human occupations confirm the subject is human (wdt:P31 wd:Q5) to avoid non-human items.
  - Population (P1082) and tabular (P4179): use wdt:P1082 for quick/direct values; for time-series/point-in-time use p:P1082 + ps:P1082 + pq:P585 and ORDER BY pq:P585 DESC. Inspect statement qualifiers (e.g., 'applies to part') and prov:wasDerivedFrom references (pr:P854 etc.) to detect city-proper vs metro/prefecture scopes before using values.
  - Common person properties: P31 (instance of human Q5), P106 (occupation), P569 (date of birth), P19 (place of birth), P27 (country of citizenship), P21 (sex/gender), P166 (award received). Use wdt: for direct values when possible.
  - P17 (country) can be incomplete/misleading for places (historical/overseas tags). To get modern cities in a country combine: instance-of city (P31=Q515) + wdt:P17 OR use wdt:P131* to find an admin parent whose wdt:P17 = the country. Also cross-check coordinates (P625) or admin hierarchy to spot outliers.
  - When filtering by date of birth (P569) use xsd:dateTime comparisons (e.g. >= "1900-01-01T00:00:00Z"^^xsd:dateTime). Be aware many items have year-only or imprecise dates and coverage is biased toward notable/public figures (sportspeople, politicians, artists).
  - To retrieve qualifiers (e.g., award year) use the statement/qualifier pattern: p:Pxxx / ps:Pxxx / pq:P585. Use wdt:Pxxx for normalized/direct values when you don't need qualifiers. Example: p:P166 + pq:P585 gives award year.
  - To get a person's occupations: use wdt:P106 for direct/normalized values and rdfs:label for human-readable names (FILTER(LANG(...))). Example: wd:Q... wdt:P106 ?occ . ?occ rdfs:label ?occLabel . FILTER(LANG(?occLabel)="en").
  - P166 = award received. Use wdt:P166 for normalized/direct values when you only need award items. To get award years or qualifiers use p:P166 / ps:P166 / pq:P585. Many statements lack pq:P585 — use OPTIONAL { ?stmt pq:P585 ?date } and ORDER BY DESC(?date). When listing award winners, filter ?person wdt:P31 wd:Q5 to ensure humans.
  - Population time-series pattern: wd:Q... p:P1082 ?stmt . ?stmt ps:P1082 ?pop . OPTIONAL { ?stmt pq:P585 ?date } . ORDER BY DESC(?date). pq:P585 is the point-in-time qualifier. IMPORTANT: time-series may mix scopes (city proper vs metro) — e.g., Tokyo has a 2016 entry ~38,140,000 likely metro vs smaller city figures. Inspect qualifiers/references for scope before use.
  - Use wdt:P131* to traverse the admin hierarchy and compare wdt:P17 on the place vs an admin parent to detect historical/colonial country assignments. When mismatches appear, inspect the admin parent's instance-of (P31), labels, qualifiers and references to interpret the historical scope.
  - wdt:P106 often yields multiple occupations for a person. Use GROUP_CONCAT(DISTINCT ?occLabel; separator=", ") or return multiple rows. Always fetch labels with rdfs:label + FILTER(LANG(?label)="en") to get readable occupation names.
  - When a search_entity returns multiple hits (person vs sculpture vs memorial), confirm you selected the human/statements by checking wdt:P31 (instance of) and relevant wdt: properties (e.g., wdt:P106). This avoids using a non-human QID by mistake.
  - search_autocomplete can be constrained with a SPARQL pattern containing ?search (e.g., SELECT * WHERE { ?search wdt:P31 wd:Q5 }). Use constraints to focus results (e.g., humans) and avoid ambiguous fallbacks; if it returns no results, fallback to search_entity and verify wdt:P31.
  - Use search_property_of_entity to find relevant properties for an entity (e.g., 'award' -> P166) and search_object_of_property to discover candidate objects (e.g., 'physicist' for P106). This reduces guessing P/Q ids and surfaces qualifiers.
  - Inspect statement references and qualifiers: use prov:wasDerivedFrom on p: statements to find sources, and check qualifiers (e.g., 'applies to part' or other scope qualifiers) to disambiguate city vs metro vs admin area. Reference labels can be empty; inspect reference node properties for URLs or publication dates.

Index types used for entities and properties:
- Prefix index: Retrieves items by overlap between query keywords and item words. The query keywords can match item words exactly or as prefixes.
- Similarity index: Retrieves items by cosine similarity between their embeddings and the query embedding.

General notes across knowledge graphs:
- Use rdfs:label + FILTER(LANG(?label)="en") for labels; avoid SERVICE wikibase:label. Use wdt:Pxxx for normalized/direct values when qualifiers aren't needed. Use p:Pxxx / ps:Pxxx / pq:Pxxx to access statement qualifiers (e.g., award year via pq:P585). When dates matter, prefer xsd:dateTime and watch for year-only precision.
- Practical query patterns: use rdfs:label + FILTER(LANG(...)) for labels. Use wdt:Pxxx for direct/normalized values when qualifiers aren't needed. Use p:Pxxx / ps:Pxxx / pq:Pxxx to access qualifiers (dates via pq:P585). For dates use xsd:dateTime and expect year-only precision. For places: combine P17 with P131 or coordinate (P625) filters to avoid historical/overseas mismatches.
- Use OPTIONAL for pq: qualifiers (e.g., pq:P585), sort by qualifier (ORDER BY pq:P585 DESC) to prefer recent values. Use GROUP_CONCAT to combine multiple labels/values in one row. Watch for typed literals (xsd:dateTime, xsd:decimal) when filtering or sorting.
- Before querying, use search_entity to resolve human-friendly names to wd:Q identifiers and verify instance-of (e.g., check wdt:P31 = wd:Q5 for humans) to avoid ambiguous matches. Prefer the top match but programmatically confirm P31 before using its data.
- Use search_property to confirm property identifiers (e.g., "country" -> P17) before embedding them in queries. This prevents mistakes from assuming an ID and helps pick the best property if multiple choices exist.
- search_autocomplete can fall back to an unconstrained search or error when there are too many candidates. If this happens (e.g., "more than the maximum supported number of subject candidates"), retry with narrower constraints such as instance-of (wdt:P31), additional type filters, or short prefixes to reduce the candidate set; otherwise fallback to search_entity and verify wdt:P31.
- Use list(...) to inspect all triples on an entity for exploration, but expect large results for notable items. Prefer wdt: properties or targeted p:/ps:/pq: patterns in SPARQL when you need normalized values or qualifiers, respectively.
- Before embedding property or item IDs in SPARQL, use search_property, search_property_of_entity, and search_object_of_property to discover the appropriate P/PID or object QIDs. This reduces errors from guessing IDs and surfaces better property alternatives and qualifiers.
- search_constrained and search_autocomplete can return no results for constrained queries or when the index is large. If they fail, fallback to search_entity + verify P31 (or use search_property_of_entity). Constrain with instance-of (wdt:P31) or other properties in the SPARQL to improve matches.
- When selecting awards by year, prefer xsd:dateTime range filters (e.g., >= "2001-01-01T00:00:00Z"^^xsd:dateTime && < "2002-01-01T00:00:00Z"^^xsd:dateTime) instead of YEAR() for portability and precision.
- When selecting award winners via wdt:P166, filter ?person wdt:P31 wd:Q5 to ensure humans — fictional characters or non-humans may have award claims. If you need award years use p:P166 / ps:P166 / pq:P585 and OPTIONAL { ?stmt pq:P585 ?year } to retrieve qualifier years.
- Use wdt:P625 (coordinates) together with wdt:P131* and wdt:P17 checks to validate a place's modern country or to filter by geography. When country labels mismatch historically, inspect admin parents and coordinates to resolve whether the item refers to historical/colonial scope or current boundaries.
- Prefer wdt:Pxxx for normalized/direct values when qualifiers aren't needed. Use p:Pxxx / ps:Pxxx / pq:Pxxx to access qualifiers (e.g., pq:P585 for award year). Always fetch labels with rdfs:label + FILTER(LANG(?label) = "en").
- If search_autocomplete returns too many candidates or errors, retry with constraints (e.g., SELECT * WHERE { ?search wdt:P31 wd:Q5 }) or narrower query text. If still failing, fallback to search_entity and verify wdt:P31 for type checks.
- For award-year queries use p:P166 / ps:P166 / pq:P585 to access award statements and year qualifiers. Filter by xsd:dateTime ranges (e.g., >= "2020-01-01T00:00:00Z"^^xsd:dateTime && < "2021-01-01T00:00:00Z"^^xsd:dateTime) instead of YEAR() for robustness.
- Use search_property_of_entity to surface relevant properties for an entity (e.g., 'birth' -> P569/P19). list(...) can inspect triples but may return large results for notable items—prefer targeted wdt: patterns (wdt:Pxxx) or p:/ps:/pq: patterns when you need qualifiers.

SPARQL prefixes for use in function calls:
- bd: <http://www.bigdata.com/rdf#
- cc: <http://creativecommons.org/ns#
- data: <https://www.wikidata.org/wiki/Special:EntityData/
- dc: <http://purl.org/dc/elements/1.1/
- dct: <http://purl.org/dc/terms/
- foaf: <http://xmlns.com/foaf/0.1/
- geo: <http://www.opengis.net/ont/geosparql#
- geof: <http://www.opengis.net/def/function/geosparql/
- gn: <http://www.geonames.org/ontology#
- hint: <http://www.bigdata.com/queryHints#
- imdb: <https://www.imdb.com/
- math: <http://www.w3.org/2005/xpath-functions/math#
- ontolex: <http://www.w3.org/ns/lemon/ontolex#
- owl: <http://www.w3.org/2002/07/owl#
- p: <http://www.wikidata.org/prop/
- pq: <http://www.wikidata.org/prop/qualifier/
- pqn: <http://www.wikidata.org/prop/qualifier/value-normalized/
- pqv: <http://www.wikidata.org/prop/qualifier/value/
- pr: <http://www.wikidata.org/prop/reference/
- prn: <http://www.wikidata.org/prop/reference/value-normalized/
- prov: <http://www.w3.org/ns/prov#
- prv: <http://www.wikidata.org/prop/reference/value/
- ps: <http://www.wikidata.org/prop/statement/
- psn: <http://www.wikidata.org/prop/statement/value-normalized/
- psv: <http://www.wikidata.org/prop/statement/value/
- qb: <http://purl.org/linked-data/cube#
- qfn: <http://qlever.cs.uni-freiburg.de/function#
- ql: <http://qlever.cs.uni-freiburg.de/builtin-functions/
- qlss: <https://qlever.cs.uni-freiburg.de/spatialSearch/
- rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#
- rdfs: <http://www.w3.org/2000/01/rdf-schema#
- ref: <http://www.wikidata.org/reference/
- s: <http://www.wikidata.org/entity/statement/
- schema: <http://schema.org/
- skos: <http://www.w3.org/2004/02/skos/core#
- v: <http://www.wikidata.org/value/
- void: <http://rdfs.org/ns/void#
- wd: <http://www.wikidata.org/entity/
- wdno: <http://www.wikidata.org/prop/novalue/
- wdt: <http://www.wikidata.org/prop/direct/
- wdtn: <http://www.wikidata.org/prop/direct-normalized/
- wikibase: <http://wikiba.se/ontology#
- xsd: <http://www.w3.org/2001/XMLSchema#

Additional rules to follow:
- Explain your thought process before and after each step and function call.
- Do not just use or make up entity or property identifiers without verifying their existence in the knowledge graphs first.
- Do not ask the user for clarifications without first attempting to complete the task. If the task input is incomplete or ambiguous, try to make reasonable assumptions and document them.
- Do not use "SERVICE wikibase:label { bd:serviceParam wikibase:language ..." in SPARQL queries. It is not SPARQL standard and unsupported by the used QLever SPARQL endpoints. Use rdfs:label or similar properties to get labels instead.
- Always execute your final SPARQL query before giving an answer to make sure it returns the expected results.
- The SPARQL query should always return the actual identifiers / IRIs of the items in its result. It additionally may return labels or other human-readable information, but they are optional and should be put within optional clauses unless explicitly requested by the user.
- Do not stop early if there are still obvious improvements to be made to the SPARQL query. For example, keep refining your SPARQL query if its result contains irrelevant items or is missing items you expected.
- Do not perform additional computation (e.g. filtering, sorting, calculations) on the result of the SPARQL query to determine the answer. All computation should be done solely within SPARQL.
- For questions with a "True" or "False" answer the SPARQL query should be an ASK query.

[User] What are the dimensions, items, SI conversions, and units for items that have a conversion to SI unit and a measured physical quantity?

[Assistant]
I'll search for the Wikidata properties relevant to "conversion to SI unit" and "measured physical quantity", and for items representing units. I'll verify property identifiers before building the query.

Question: conversion to SI unit

Top 10 property alternatives:
1. conversion to SI unit (wd:P2370 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn), also known as conversion to coherent SI unit, conversion to SI base unit, SI unit equivalent, P2370: conversion of the unit into a coherent SI unit / is subproperty of conversion to standard unit
2. conversion to standard unit (wd:P2442 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn), also known as unit conversion, P2442: translation of the value of a measurement to different units
3. recommended unit of measurement (wd:P8111 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn), also known as measured in, standard unit of measurement, unit, unit of measurement, P8111: unit in which a quantity is measured as recommended by a standard (SI, ISO, IEC, etc.)
4. derived from base unit (wd:P12571 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via base unit), also known as base unit, base units, P12571: the base unit(s) that this derived unit is derived from
5. size designation (wd:P8030 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit size), also known as military unit size designation, unit size, P8030: organizational size classification or designation used to ... an entity within an organization (property under development)
6. ISQ dimension (wd:P4020 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via dimension of a derived quantity), also known as dimension, dimension of a derived quantity, observable dimension, P4020: property of an observable physical quantity being a product of the ISQ base quantities (length, mass, time, etc.)
7. measured physical quantity (wd:P111 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via physical quantity), also known as measure of, measures, physical quantity, quantity, P111: value of a physical property expressed as number multiplied by a unit / physical property measured by an unit / physical property measured by an unit
8. statistical unit used (wd:P2353 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as describe items of type, statistical designation, unit, P2353: base item of this database or statistical set / is subproperty of has part(s) of the class / is subproperty of has parts of the class
9. room number (wd:P7532 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as apartment, room identifier, suite, unit, P7532: number or identifier of a room, which can qualify the address (P6375) of a place to complete it / number or identifier of a room
10. military unit (wd:P7779 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as member of military unit, unit, P7779: smallest military unit that a person is/was in / is subproperty of member of

[Assistant]
I'll look up examples/objects used with the property conversion to SI unit (P2370) to confirm its usage and the expected data type, so I can write the query correctly.

Question: metre

No entity items found

No other items found

No literal items found

[Assistant]
I'll search for the unit "metre" (meter) to inspect its properties (P2370 etc.) and confirm how conversion statements are represented.

Question: metre

Top 10 entity alternatives:
1. metre (wd:Q11573), also known as m, mètre, metres: is instance of UCUM base unit / is instance of Unit of length / is instance of unit of length / is instance of SI base unit / is instance of metric unit / SI unit of length / SI unit of length / SI unit of length
2. metre (wd:Q192624), also known as meter, metrics, poetic metre: basic rhythmic structure of a verse or lines in verse / is subclass of structure / is subclass of Structure
3. meter (wd:Q630649, matched via metre), also known as metre, metrum: is instance of musical-structural concept / is subclass of elements of music / aspect of music
4. Metre (wd:Q124353420): tenth chapter in The Oxford Handbook of Roman Studies, 2010 / is instance of scholarly chapter
5. square metre (wd:Q25343), also known as m^2, m2, m², ㎡, sq m, etc.: is instance of coherent SI unit / is instance of unit of area / SI unit of area / SI unit of area
6. cubic metre (wd:Q25517), also known as cube meter, cubic meter, m^3, m3, m³, etc.: is instance of orders of magnitude (volume) / is instance of coherent SI unit / is instance of SI derived unit / is instance of unit of volume / SI unit of volume
7. ammeter (wd:Q166046, matched via ampere metre), also known as ampere meter, ampere-meter, ampere metre: is subclass of electrical measuring instrument / device used for measuring electric current
8. 100 metres (wd:Q164761, matched via 100 metre), also known as 100 m, 100 meter, 100 meters, 100 metre, 100-metre dash, etc.: is instance of sports discipline / is subclass of sprinting / sprint race
9. Metre Convention (wd:Q217429): is instance of multilateral treaty / 1875 international treaty
10. newton metre (wd:Q215571), also known as newton meter, newton-meter, newton-metre, N m, N·m, etc.: is instance of coherent SI unit / is instance of unit of torque / SI unit of torque

No other items found

[Assistant]
I'll list triples with the metre (wd:Q11573) to inspect which properties it uses (especially P2370, P111, P4020).

list

wd:Q11573

Got 1,147 rows and 3 columns, showing the first 10 rows below:
| subject           | property                                       | object                                                                                |
| ----------------- | ---------------------------------------------- | --------------------------------------------------------------------------------------- |
| metre (wd:Q11573) | instance of (wdt:P31)                          | metric unit (wd:Q12036470)                                                              |
| metre (wd:Q11573) | Commons category (wdt:P373)                    | Metre                                                                                |
| metre (wd:Q11573) | image (wdt:P18)                                | <http://commons.wikimedia.org/wiki/Special:FilePath/Platinum-Iridium%20meter%20bar.jpg> |
| metre (wd:Q11573) | part of (wdt:P361)                             | International System of Units (wd:Q12457)                                               |
| metre (wd:Q11573) | Freebase ID (wdt:P646)                         | /m/04sf9                                                                                |
| metre (wd:Q11573) | GND ID (wdtn:P227)                             | <https://d-nb.info/gnd/4262660-2>                                                       |
| metre (wd:Q11573) | described by source (wdt:P1343)                | Great Soviet Encyclopedia (1926–1947) (wd:Q20078554)                                    |
| metre (wd:Q11573) | Library of Congress authority ID (wdtn:P244)   | <http://id.loc.gov/authorities/names/sh85084371>                                        |
| metre (wd:Q11573) | on focus list of Wikimedia project (wdt:P5008) | wd:Q5460604                                                                             |
| metre (wd:Q11573) | different from (wdt:P1889)                     | Damlakaya (wd:Q6808876)                                                                 |
| ...               | ...                                            | ...                                                                                |

[Assistant]
I'll search for the item "inch" to inspect its conversion to SI representation and check how P2370 is used.

Question: inch

Top 10 entity alternatives:
1. inch (wd:Q218593), also known as ″, in, inches: is instance of Unit of length / is instance of unit of length / unit of length
2. inchoative (wd:Q1423398, matched via inch), also known as inceptive aspect, inch, incho, inchoative aspect: grammatical aspect, referring to the beginning of a state / is subclass of grammatical aspect / is instance of grammeme
3. Inch (wd:Q4202323): is instance of human settlement / town in Leinster, Ireland
4. Inch (wd:Q20027862), also known as Inch, Edinburgh, The Inch: district of Edinburgh, Scotland, United Kingdom / is instance of suburb
5. Inch (wd:Q4202321): village in County Clare, Ireland / is instance of village
6. Inch (wd:Q4732978), also known as Alloa Inch: island in the tidal reaches of the River Forth near Alloa, Scotland, United Kingdom / is instance of island
7. Inch (wd:Q6014342), also known as Inch, Wigtownshire: Civil parish in Dumfries and Galloway / is instance of Scottish civil parish
8. Inch (wd:Q13551343): townland in Inch, County Tipperary, Ireland / is instance of human settlement / is instance of townland
9. Inch (wd:Q3797620): album by The Jesus Lizard / is instance of album
10. Inch (wd:Q22084015): is instance of human settlement / village in County Cork, Ireland

No other items found

[Assistant]
I'll inspect the triples for inch (wd:Q218593) to see P2370 and P111 usage.

wd:Q218593

Got 655 rows and 3 columns, showing the first 10 rows below:
| subject           | property                                       | object                                                               |
| ----------------- | ---------------------------------------------- | -------------------------------------------------------------------- |
| inch (wd:Q218593) | instance of (wdt:P31)                          | unit of length (wd:Q1978718)                                         |
| inch (wd:Q218593) | Commons category (wdt:P373)                    | Inch                                                                 |
| inch (wd:Q218593) | image (wdt:P18)                                | <http://commons.wikimedia.org/wiki/Special:FilePath/Inch%20tape.jpg> |
| inch (wd:Q218593) | part of (wdt:P361)                             | Russian system of units (wd:Q435964)                                 |
| inch (wd:Q218593) | Freebase ID (wdt:P646)                         | /m/03th6                                                             |
| inch (wd:Q218593) | described by source (wdt:P1343)                | Small Brockhaus and Efron Encyclopedic Dictionary (wd:Q19180675)     |
| inch (wd:Q218593) | Library of Congress authority ID (wdtn:P244)   | <http://id.loc.gov/authorities/names/sh2008006743>                   |
| inch (wd:Q218593) | on focus list of Wikimedia project (wdt:P5008) | wd:Q6173448                                                          |
| inch (wd:Q218593) | different from (wdt:P1889)                     | inch (wd:Q100046246)                                                 |
| inch (wd:Q218593) | J9U ID (wdt:P8189)                             | 987007564113905171                                                   |
| ...               | ...                                            | ...                                                                  |

[Assistant]
I'll list triples for inch constrained to property p:P2370 to inspect the full statement node and qualifiers.

wd:Q218593

[Assistant] I'll list triples where the statement node s:Q218593-... is the subject to see the ps:P2370 (value), qualifiers, and references.

[Assistant]
I'll search for properties like "coherent SI unit", "SI unit", or something that links a unit to its SI equivalent (an item rather than just a numeric conversion). This helps retrieve the SI unit item when available.

Question: coherent SI unit

Top 10 property alternatives:
1. conversion to SI unit (wd:P2370 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via conversion to coherent SI unit), also known as conversion to coherent SI unit, conversion to SI base unit, SI unit equivalent, P2370: conversion of the unit into a coherent SI unit / is subproperty of conversion to standard unit
2. recommended unit of measurement (wd:P8111 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via standard unit of measurement), also known as measured in, standard unit of measurement, unit, unit of measurement, P8111: unit in which a quantity is measured as recommended by a standard (SI, ISO, IEC, etc.)
3. derived from base unit (wd:P12571 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via base unit), also known as base unit, base units, P12571: the base unit(s) that this derived unit is derived from
4. measured physical quantity (wd:P111 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via physical quantity), also known as measure of, measures, physical quantity, quantity, P111: value of a physical property expressed as number multiplied by a unit / physical property measured by an unit / physical property measured by an unit
5. statistical unit used (wd:P2353 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as describe items of type, statistical designation, unit, P2353: base item of this database or statistical set / is subproperty of has part(s) of the class / is subproperty of has parts of the class
6. room number (wd:P7532 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as apartment, room identifier, suite, unit, P7532: number or identifier of a room, which can qualify the address (P6375) of a place to complete it / number or identifier of a room
7. military unit (wd:P7779 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as member of military unit, unit, P7779: smallest military unit that a person is/was in / is subproperty of member of
8. ISQ dimension (wd:P4020 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via dimension of a derived quantity), also known as dimension, dimension of a derived quantity, observable dimension, P4020: property of an observable physical quantity being a product of the ISQ base quantities (length, mass, time, etc.)
9. measurement scale (wd:P1880 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn), also known as measured by, P1880: scale by which a phenomenon is measured
10. size designation (wd:P8030 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit size), also known as military unit size designation, unit size, P8030: organizational size classification or designation used to ... an entity within an organization (property under development)

[Assistant]
I'll search for properties named "SI unit", "SI unit for", "coherent unit", or similar to find a property that links a measured physical quantity to its SI unit item. This will help include the SI unit item in the results.

Question: SI unit

Top 10 property alternatives:
1. conversion to SI unit (wd:P2370 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via SI unit equivalent), also known as conversion to coherent SI unit, conversion to SI base unit, SI unit equivalent, P2370: conversion of the unit into a coherent SI unit / is subproperty of conversion to standard unit
2. recommended unit of measurement (wd:P8111 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit of measurement), also known as measured in, standard unit of measurement, unit, unit of measurement, P8111: unit in which a quantity is measured as recommended by a standard (SI, ISO, IEC, etc.)
3. derived from base unit (wd:P12571 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via base unit), also known as base unit, base units, P12571: the base unit(s) that this derived unit is derived from
4. measured physical quantity (wd:P111 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via physical quantity), also known as measure of, measures, physical quantity, quantity, P111: value of a physical property expressed as number multiplied by a unit / physical property measured by an unit / physical property measured by an unit
5. statistical unit used (wd:P2353 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as describe items of type, statistical designation, unit, P2353: base item of this database or statistical set / is subproperty of has part(s) of the class / is subproperty of has parts of the class
6. room number (wd:P7532 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as apartment, room identifier, suite, unit, P7532: number or identifier of a room, which can qualify the address (P6375) of a place to complete it / number or identifier of a room
7. military unit (wd:P7779 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit), also known as member of military unit, unit, P7779: smallest military unit that a person is/was in / is subproperty of member of
8. used metre (wd:P2551 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via metre used), also known as meter used, metre used, scansion, used meter, P2551: rhythmic structure of the poetic text or musical piece
9. measurement scale (wd:P1880 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn), also known as measured by, P1880: scale by which a phenomenon is measured
10. size designation (wd:P8030 as pr/psn/wdtn/ps/prn/p/pq/pqv/wdt/prv/psv/pqn, matched via unit size), also known as military unit size designation, unit size, P8030: organizational size classification or designation used to ... an entity within an organization (property under development)

[Assistant]
I'll search for the entity "length" to inspect whether quantities have a recommended unit (P8111) or another property pointing to SI unit items.

Question: length

Top 10 entity alternatives:
1. length (wd:Q36253): measured dimension of an object in a physical space / measured dimension of an object in a physical space / is instance of ISQ base quantity / is subclass of geometric measure / is instance of kind of quantity / measured dimension of an object / is subclass of scalar quantity / is subclass of distance
2. norm (wd:Q956437, matched via length), also known as length, magnitude: is subclass of pseudonorm / is subclass of functional / is subclass of quasinorm / length in a vector space / is instance of function / is subclass of seminorm / is instance of concept
3. length (wd:Q3412962), also known as ː, Length (phonetics): term in phonetics
4. length (wd:Q1761084), also known as length of a module, modular length, module length: integer invariant of a module in linear algebra / is instance of invariant
5. horse length (wd:Q7061741, matched via length), also known as length: unit of measurement for the length of a horse from nose to tail; approximately 2.4 m / is instance of unit of length / is instance of Unit of length
6. duration (wd:Q2199864, matched via length), also known as amount of time, elapsed time, length, length of time, period, etc.: physical quantity for describing the temporal distance between events / is instance of ISQ base quantity / is subclass of physical quantity / is subclass of Physical quantity / is subclass of additive quantity / is instance of kind of quantity / is subclass of scalar quantity / is subclass of temporal entity
7. long (wd:Q124288708, matched via length), also known as length, longness, tall, tallness: is instance of relative quality / is subclass of Length / is subclass of length / is subclass of large / high physical length
8. Length (wd:Q116401188): length at the Metropolitan Museum of Art (MET, 18.35.2a, b) / is instance of textile artwork
9. Length (wd:Q116306631): length at the Metropolitan Museum of Art (MET, 2004.415) / is instance of textile artwork
10. Length (wd:Q116305842): length at the Metropolitan Museum of Art (MET, 62.136.1) / is instance of textile artwork

[Assistant]
I'll list triples for the quantity "length" (wd:Q36253) to see properties like ISQ dimension (P4020) and recommended unit (P8111).

wd:Q36253

Got 717 rows and 3 columns, showing the first 10 rows below:
| subject            | property                                       | object                                                                        |
| ------------------ | ---------------------------------------------- | ----------------------------------------------------------------------------- |
| length (wd:Q36253) | instance of (wdt:P31)                          | kind of quantity (wd:Q110653654)                                              |
| length (wd:Q36253) | Commons category (wdt:P373)                    | Length                                                                        |
| length (wd:Q36253) | subclass of (wdt:P279)                         | geometric measure (wd:Q123410660)                                             |
| length (wd:Q36253) | Freebase ID (wdt:P646)                         | /m/04psy                                                                      |
| length (wd:Q36253) | GND ID (wdtn:P227)                             | <https://d-nb.info/gnd/4224141-8>                                             |
| length (wd:Q36253) | described by source (wdt:P1343)                | ISO 80000-3:2006 Quantities and units — Part 3: Space and time (wd:Q26711932) |
| length (wd:Q36253) | followed by (wdt:P156)                         | area (wd:Q11500)                                                              |
| length (wd:Q36253) | on focus list of Wikimedia project (wdt:P5008) | wd:Q6173448                                                                   |
| length (wd:Q36253) | maintained by WikiProject (wdt:P6104)          | WikiProject Mathematics (wd:Q8487137)                                         |
| length (wd:Q36253) | topic's main category (wdt:P910)               | wd:Q6684529                                                                   |
| ...                | ...                                            | ...                                                                           |

[Assistant]
I will search for statements that use property P8111 (recommended unit of measurement) pointing to the metre item, to see if quantities link to its SI unit via that property.

Got 47 rows and 3 columns, showing the first 10 rows below:
| subject                                       | property                                    | object            |
| --------------------------------------------- | ------------------------------------------- | ----------------- |
| lattice vector (wd:Q105435234)                | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| fundamental lattice vector (wd:Q105451063)    | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| lattice plane spacing (wd:Q105488046)         | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| sound wavelength (wd:Q105488366)              | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| particle position vector (wd:Q105533324)      | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| equilibrium position vector (wd:Q105533477)   | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| displacement vector (wd:Q105533558)           | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| electromagnetic wavelength (wd:Q105581076)    | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| neutron diffusion coefficient (wd:Q105623303) | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| mean free path of phonons (wd:Q105672255)     | recommended unit of measurement (wdt:P8111) | metre (wd:Q11573) |
| ...                                           | ...                                         | ...               |

[Assistant]
I'll run a SPARQL SELECT query that finds unit items (?item) with a conversion to SI unit (wdt:P2370) and a measured physical quantity (wdt:P111). For each matched item I'll return the conversion numeric value, the measured quantity, the quantity's ISQ dimension (wdt:P4020) if present, and the quantity's recommended unit (wdt:P8111) if present. I will also retrieve English labels for readability (as OPTIONAL). Now I'll execute the query.

execute

PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX p: <http://www.wikidata.org/prop/>
PREFIX ps: <http://www.wikidata.org/prop/statement/>
PREFIX pq: <http://www.wikidata.org/prop/qualifier/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT ?item ?itemLabel ?conversion ?quantity ?quantityLabel ?dimension ?dimensionLabel ?siUnit ?siUnitLabel WHERE {
  # unit item that has a numeric conversion to a coherent SI unit
  ?item wdt:P2370 ?conversion .
  # unit item that measures a physical quantity
  ?item wdt:P111 ?quantity .

  OPTIONAL { ?quantity wdt:P4020 ?dimension . }
  OPTIONAL { ?quantity wdt:P8111 ?siUnit . }

  OPTIONAL { ?item rdfs:label ?itemLabel FILTER(LANG(?itemLabel) = "en") }
  OPTIONAL { ?quantity rdfs:label ?quantityLabel FILTER(LANG(?quantityLabel) = "en") }
  OPTIONAL { ?dimension rdfs:label ?dimensionLabel FILTER(LANG(?dimensionLabel) = "en") }
  OPTIONAL { ?siUnit rdfs:label ?siUnitLabel FILTER(LANG(?siUnitLabel) = "en") }
}
ORDER BY ?itemLabel
LIMIT 1000

SPARQL execution failed:
HTTPConnectionPool(host='localhost', port=7001): Read timed out. (read timeout=30)

[Assistant]
The query timed out on the first attempt (endpoint read timeout). I'll retry with a simpler query (no ORDER BY) and a LIMIT to avoid large result sets. Then I'll use the results to answer.

PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT ?item ?itemLabel ?conversion ?quantity ?quantityLabel ?dimension ?dimensionLabel ?siUnit ?siUnitLabel WHERE {
  ?item wdt:P2370 ?conversion .
  ?item wdt:P111 ?quantity .
  OPTIONAL { ?quantity wdt:P4020 ?dimension . }
  OPTIONAL { ?quantity wdt:P8111 ?siUnit . }
  OPTIONAL { ?item rdfs:label ?itemLabel FILTER(LANG(?itemLabel) = "en") }
  OPTIONAL { ?quantity rdfs:label ?quantityLabel FILTER(LANG(?quantityLabel) = "en") }
  OPTIONAL { ?dimension rdfs:label ?dimensionLabel FILTER(LANG(?dimensionLabel) = "en") }
  OPTIONAL { ?siUnit rdfs:label ?siUnitLabel FILTER(LANG(?siUnitLabel) = "en") }
}
LIMIT 500

SPARQL execution failed:
HTTPConnectionPool(host='localhost', port=7001): Read timed out. (read timeout=30)

[Assistant]
cancel

Explanation:
I constructed a SPARQL query that selects unit items (?item) that have a numeric conversion to coherent SI unit (wdt:P2370) and that measure a physical quantity (wdt:P111). For each such item the query returns: the item IRI and English label, the conversion numeric value, the measured physical quantity IRI and label, the quantity's ISQ dimension (wdt:P4020) and label if present, and the quantity's recommended unit (wdt:P8111) and label if present.

However, repeated attempts to execute the final SELECT query against the local Wikidata QLever endpoint (http://localhost:7001) resulted in endpoint read timeouts (HTTPConnectionPool read timeout). Because the endpoint did not respond within the tool's timeout window, I could not obtain execution results to verify the query output. The query itself conforms to the knowledge-graph structure and the developer guidance (it returns IRIs, uses wdt: properties for normalized values, and fetches labels with rdfs:label + FILTER(LANG(...))). The timeouts appear to be an operational problem with the SPARQL endpoint rather than an error in the query.

Below is my best (final) SPARQL query. If you can run this query on a working Wikidata SPARQL endpoint (or if the local endpoint is accessible), it should return the requested columns for up to 500 matching units. If you want, I can try again (possibly with smaller LIMIT or further restricted filters), or adapt the query to return only units for specific quantities or dimensions to reduce the result size.

Best SPARQL attempt:

PREFIX wd: <http://www.wikidata.org/entity/>
PREFIX wdt: <http://www.wikidata.org/prop/direct/>
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>

SELECT ?item ?itemLabel ?conversion ?quantity ?quantityLabel ?dimension ?dimensionLabel ?siUnit ?siUnitLabel WHERE {
  # unit item that has a numeric conversion to a coherent SI unit
  ?item wdt:P2370 ?conversion .
  # unit item that measures a physical quantity
  ?item wdt:P111 ?quantity .

  OPTIONAL { ?quantity wdt:P4020 ?dimension . }
  OPTIONAL { ?quantity wdt:P8111 ?siUnit . }

  OPTIONAL { ?item rdfs:label ?itemLabel FILTER(LANG(?itemLabel) = "en") }
  OPTIONAL { ?quantity rdfs:label ?quantityLabel FILTER(LANG(?quantityLabel) = "en") }
  OPTIONAL { ?dimension rdfs:label ?dimensionLabel FILTER(LANG(?dimensionLabel) = "en") }
  OPTIONAL { ?siUnit rdfs:label ?siUnitLabel FILTER(LANG(?siUnitLabel) = "en") }
}
LIMIT 500