Line 21
E190887
Line 21 is a rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving suburban and outlying districts with high-speed urban rail service.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Line 21 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1650413 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Line 21 Context triple: [Guangzhou Metro, hasLine, Line 21]
-
A.
Line 19
Line 19 is a north–south rapid transit line of the Beijing Subway designed to improve connectivity between the city's central districts and its outer areas.
-
B.
Line 18
Line 18 is a high-speed rapid transit line of the Guangzhou Metro system in Guangzhou, China.
-
C.
Line 17
Line 17 is a rapid transit line of the Beijing Subway system designed to improve north–south connectivity across the city.
-
D.
Line 16
Line 16 is a rapid transit line of the Beijing Subway system serving parts of the city with modern, high-capacity metro service.
-
E.
Line 15
Line 15 is a rapid transit line of the Beijing Subway system serving northern parts of the city with both urban and suburban stations.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Line 21 Target entity description: Line 21 is a rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving suburban and outlying districts with high-speed urban rail service.
-
A.
Line 19
Line 19 is a north–south rapid transit line of the Beijing Subway designed to improve connectivity between the city's central districts and its outer areas.
-
B.
Line 18
Line 18 is a high-speed rapid transit line of the Guangzhou Metro system in Guangzhou, China.
-
C.
Line 17
Line 17 is a rapid transit line of the Beijing Subway system designed to improve north–south connectivity across the city.
-
D.
Line 16
Line 16 is a rapid transit line of the Beijing Subway system serving parts of the city with modern, high-capacity metro service.
-
E.
Line 15
Line 15 is a rapid transit line of the Beijing Subway system serving northern parts of the city with both urban and suburban stations.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
rapid transit line ⓘ |
| character |
at-grade
ⓘ
elevated ⓘ underground ⓘ |
| cityServed | Guangzhou ⓘ |
| country | China ⓘ |
| electrification | overhead line ⓘ |
| fareSystem | Guangzhou Metro fare system ⓘ |
| isPartOfNetwork | urban rail transit in Guangzhou ⓘ |
| locatedIn |
China
ⓘ
Guangdong Province ⓘ
surface form:
Guangdong
Guangzhou ⓘ |
| operator | Guangzhou Metro Group ⓘ |
| owner |
Guangzhou Municipal People’s Government
ⓘ
surface form:
Guangzhou Municipal Government
|
| partOf | Guangzhou Metro ⓘ |
| primaryFunction |
connect central Guangzhou with suburban areas
ⓘ
provide high-speed metro service to outlying districts ⓘ |
| publicTransportSystem | Guangzhou Metro ⓘ |
| railwaySignalling |
automatic train control
ⓘ
automatic train operation ⓘ automatic train protection ⓘ |
| regionServed | Guangdong Province ⓘ |
| serves |
outlying districts of Guangzhou
ⓘ
suburban districts of Guangzhou ⓘ |
| serviceType | high-speed urban rail ⓘ |
| system |
Guangzhou Metro
ⓘ
surface form:
Guangzhou Metro system
|
| trackGauge | standard gauge ⓘ |
| transitType | rapid transit ⓘ |
| uses |
Shanghai Metro Type A trains
ⓘ
surface form:
China Railway Type A metro trains
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Line 21 Description of subject: Line 21 is a rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving suburban and outlying districts with high-speed urban rail service.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.