Changsha Metro Line 4
E665363
Changsha Metro Line 4 is a rapid transit line in Changsha, China, forming part of the city's urban subway network and connecting key districts across the metropolitan area.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Changsha Metro Line 4 canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7384890 — 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: Changsha Metro Line 4 Context triple: [Changsha Metro, hasLine, Changsha Metro Line 4]
-
A.
Changsha Metro Line 6
Changsha Metro Line 6 is a rapid transit line in Changsha, China, that provides urban rail service including a direct link to Changsha Huanghua International Airport.
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B.
Changsha Metro Line 3
Changsha Metro Line 3 is a rapid transit line in Changsha, China, forming part of the city's urban subway network and connecting key districts across the metropolitan area.
-
C.
Changsha Metro Line 2
Changsha Metro Line 2 is a major east–west rapid transit line in Changsha, China, connecting key urban districts and serving as one of the city's primary public transportation corridors.
-
D.
Changsha Metro
Changsha Metro is the rapid transit system serving Changsha, the capital of Hunan Province in China, providing urban rail transportation across the city and its suburbs.
-
E.
Wuhan Metro Line 4
Wuhan Metro Line 4 is an east–west rapid transit line in Wuhan, China, known for connecting major urban districts and serving key transport hubs across the city.
- 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: Changsha Metro Line 4 Target entity description: Changsha Metro Line 4 is a rapid transit line in Changsha, China, forming part of the city's urban subway network and connecting key districts across the metropolitan area.
-
A.
Changsha Metro Line 6
Changsha Metro Line 6 is a rapid transit line in Changsha, China, that provides urban rail service including a direct link to Changsha Huanghua International Airport.
-
B.
Changsha Metro Line 3
Changsha Metro Line 3 is a rapid transit line in Changsha, China, forming part of the city's urban subway network and connecting key districts across the metropolitan area.
-
C.
Changsha Metro Line 2
Changsha Metro Line 2 is a major east–west rapid transit line in Changsha, China, connecting key urban districts and serving as one of the city's primary public transportation corridors.
-
D.
Changsha Metro
Changsha Metro is the rapid transit system serving Changsha, the capital of Hunan Province in China, providing urban rail transportation across the city and its suburbs.
-
E.
Wuhan Metro Line 4
Wuhan Metro Line 4 is an east–west rapid transit line in Wuhan, China, known for connecting major urban districts and serving key transport hubs across the city.
- F. None of above. chosen
Statements (41)
| Predicate | Object |
|---|---|
| instanceOf |
public transport infrastructure
ⓘ
rapid transit line ⓘ |
| character | underground ⓘ |
| cityServed | Changsha NERFINISHED ⓘ |
| connects |
commercial districts in Changsha
ⓘ
industrial districts in Changsha ⓘ residential districts in Changsha ⓘ transport hubs in Changsha ⓘ |
| country | China ⓘ |
| electrification |
1500 V DC
ⓘ
overhead line ⓘ |
| fareCollection |
QR code ticketing
ⓘ
contactless smart card ⓘ |
| fareSystem | integrated with Changsha Metro ⓘ |
| hasColor |
blue‑green
ⓘ
turquoise ⓘ |
| hasMode | subway ⓘ |
| hasRollingStock | Type B metro trains ⓘ |
| isPartOf | Changsha rail transit network NERFINISHED ⓘ |
| lineNumber | 4 ⓘ |
| locatedIn |
Changsha
NERFINISHED
ⓘ
China ⓘ Hunan Province NERFINISHED ⓘ |
| network | Changsha urban subway network NERFINISHED ⓘ |
| numberOfTracks | 2 ⓘ |
| openingDate | 2019-05-26 ⓘ |
| operator | Changsha Metro Group NERFINISHED ⓘ |
| owner | Changsha municipal government NERFINISHED ⓘ |
| partOf |
Changsha Metro
NERFINISHED
ⓘ
urban rail transit in Changsha ⓘ |
| purpose |
reduce road congestion in Changsha
ⓘ
urban mass transit ⓘ |
| railwaySignalling | CBTC ⓘ |
| regionServed | Changsha metropolitan area NERFINISHED ⓘ |
| safetySystem | platform screen doors at most stations ⓘ |
| serves | key districts of Changsha metropolitan area ⓘ |
| startOperationYear | 2019 ⓘ |
| system | Changsha Metro NERFINISHED ⓘ |
| trackGauge |
1435 mm
ⓘ
standard gauge ⓘ |
| transportType | rapid transit ⓘ |
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: Changsha Metro Line 4 Description of subject: Changsha Metro Line 4 is a rapid transit line in Changsha, China, forming part of the city's urban subway network and connecting key districts across the metropolitan area.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.