Line 4
E467935
Line 4 is a major north–south route of the Seoul Metropolitan Subway system, connecting central Seoul with surrounding suburban areas.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Line 4 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4749915 — 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 4 Context triple: [Seoul Metropolitan Subway, hasPart, Line 4]
-
A.
Line 4
Line 4 is a rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving key urban and suburban areas along its north–south corridor.
-
B.
Line 4
Line 4 is one of the main lines of the Tehran Metro rapid transit system, serving key east–west corridors across Iran’s capital city.
-
C.
Line 4
Line 4 is one of the main north–south lines of the Paris Métro, known for serving central Paris and connecting key railway stations and neighborhoods.
-
D.
Line 4
Line 4 is a planned rapid transit route within the future Ho Chi Minh City Metro system in Vietnam.
-
E.
Line 4
Line 4 is a rapid transit line of the Barcelona Metro network that serves several central and coastal neighborhoods in 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: Line 4 Target entity description: Line 4 is a major north–south route of the Seoul Metropolitan Subway system, connecting central Seoul with surrounding suburban areas.
-
A.
Line 4
Line 4 is one of the main north–south lines of the Paris Métro, known for serving central Paris and connecting key railway stations and neighborhoods.
-
B.
Line 4
Line 4 is a major north–south rapid transit route in the Beijing Subway system, serving key commercial, residential, and university areas of the city.
-
C.
Line 4
Line 4 is a circular rapid transit route of the Shanghai Metro system that loops around central districts and provides key transfer connections across the network.
-
D.
Line 4
Line 4 is a rapid transit line of the Guangzhou Metro system in Guangzhou, China, serving key urban and suburban areas along its north–south corridor.
-
E.
Line 4
Line 4 is a rapid transit line of the Shenzhen Metro system in Shenzhen, China, serving as one of the city's major north–south corridors.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
metro line
ⓘ
rapid transit line ⓘ |
| color | light blue ⓘ |
| connects |
central Seoul
ⓘ
suburban areas around Seoul ⓘ |
| country | South Korea ⓘ |
| direction | north–south ⓘ |
| electrification | 1500 V DC overhead catenary ⓘ |
| fareSystem | integrated metropolitan fare system ⓘ |
| hasRollingStock |
Korail Class 341000 trains
ⓘ
Seoul Metro 4000 series trains ⓘ |
| hasSection |
Korail Ansan Line section
ⓘ
Seoul Metro-operated urban section ⓘ |
| hasServicePattern |
express trains on Ansan section
ⓘ
local trains ⓘ |
| interchangeWith |
Gyeongui–Jungang Line
ⓘ
Line 1 (Seoul Metropolitan Subway) ⓘ
linked to:
Seoul Subway Line 1
Line 2 (Seoul Metropolitan Subway) ⓘ
linked to:
Seoul Subway Line 2
Line 3 (Seoul Metropolitan Subway) ⓘ
linked to:
Seoul Subway Line 3
Line 5 (Seoul Metropolitan Subway) ⓘ
linked to:
Seoul Subway Line 5
Line 7 (Seoul Metropolitan Subway) ⓘ
linked to:
Seoul Subway Line 7
Line 9 (Seoul Metropolitan Subway) ⓘ
linked to:
Seoul Subway Line 9
Suin–Bundang Line ⓘ |
| languageOfName | Korean ⓘ |
| lineNumber | 4 ⓘ |
| locatedIn |
Gyeonggi Province
ⓘ
Seoul ⓘ |
| nativeName |
서울 지하철 4호선
ⓘ
linked to:
Seoul Subway Line 4
|
| opened | 1985 ⓘ |
| operator |
Korail
ⓘ
Seoul Metro ⓘ |
| partOf | Seoul Metropolitan Subway ⓘ |
| primaryFunction | commuter transport ⓘ |
| safetySystem | platform screen doors on most stations ⓘ |
| servesArea |
central business districts of Seoul
ⓘ
residential suburbs in southern Gyeonggi Province ⓘ |
| servesStation |
Dongdaemun History & Culture Park Station
ⓘ
Myeong-dong Station ⓘ Sadang Station ⓘ Seoul Station ⓘ Suwon City Hall vicinity via transfer ⓘ |
| system |
Seoul Metropolitan Subway system
ⓘ
linked to:
Seoul Metropolitan Subway
|
| terminus |
Ansan direction
ⓘ
Danggogae Station ⓘ Oido Station ⓘ |
| ticketing | T-money compatible ⓘ |
| trackGauge | 1435 mm standard gauge ⓘ |
| usesSignaling | automatic train control ⓘ |
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 4 Description of subject: Line 4 is a major north–south route of the Seoul Metropolitan Subway system, connecting central Seoul with surrounding suburban areas.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.