Seoul Subway Line 4
E544808
Seoul Subway Line 4 is a major north–south rapid transit line in the Seoul Metropolitan Subway system, connecting central districts like Jongno-gu with outlying areas and key hubs such as Sadang, Suwon, and Danggogae.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Seoul Subway Line 4 canonical | 7 |
How this entity was disambiguated
This entity first appeared as the object of triple T5575228 — 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: Seoul Subway Line 4 Context triple: [Jongno-gu, transportServedBy, Seoul Subway Line 4]
-
A.
Seoul Subway Line 5
Seoul Subway Line 5 is a major east–west rapid transit line in Seoul’s subway system that links key districts and facilities, including Gimpo International Airport, across the city.
-
B.
Seoul Subway Line 3
Seoul Subway Line 3 is a major north–south rapid transit line in Seoul’s subway network, connecting key districts including Gangnam with central and northern parts of the city.
-
C.
Seoul Subway Line 9
Seoul Subway Line 9 is a major east–west rapid transit line in Seoul known for its express services that connect key business districts and residential areas across the city.
-
D.
Seoul Subway Line 6
Seoul Subway Line 6 is a rapid transit line in the Seoul Metropolitan Subway system that runs in a semi-circular route through northern and central Seoul, connecting key residential and entertainment districts.
-
E.
Seoul Subway Line 7
Seoul Subway Line 7 is a major north–south subway line in Seoul’s metropolitan rail network, connecting key residential and commercial districts including Gangnam.
- 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: Seoul Subway Line 4 Target entity description: Seoul Subway Line 4 is a major north–south rapid transit line in the Seoul Metropolitan Subway system, connecting central districts like Jongno-gu with outlying areas and key hubs such as Sadang, Suwon, and Danggogae.
-
A.
Seoul Subway Line 5
Seoul Subway Line 5 is a major east–west rapid transit line in Seoul’s subway system that links key districts and facilities, including Gimpo International Airport, across the city.
-
B.
Seoul Subway Line 3
Seoul Subway Line 3 is a major north–south rapid transit line in Seoul’s subway network, connecting key districts including Gangnam with central and northern parts of the city.
-
C.
Seoul Subway Line 9
Seoul Subway Line 9 is a major east–west rapid transit line in Seoul known for its express services that connect key business districts and residential areas across the city.
-
D.
Seoul Subway Line 6
Seoul Subway Line 6 is a rapid transit line in the Seoul Metropolitan Subway system that runs in a semi-circular route through northern and central Seoul, connecting key residential and entertainment districts.
-
E.
Seoul Subway Line 7
Seoul Subway Line 7 is a major north–south subway line in Seoul’s metropolitan rail network, connecting key residential and commercial districts including Gangnam.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Seoul Metropolitan Subway line
ⓘ
metro line ⓘ |
| connectsArea |
Danggogae
NERFINISHED
ⓘ
Oido NERFINISHED ⓘ Sadang NERFINISHED ⓘ |
| connectsCity | Suwon NERFINISHED ⓘ |
| connectsDistrict |
Dongjak-gu
NERFINISHED
ⓘ
Geumcheon-gu NERFINISHED ⓘ Jongno-gu NERFINISHED ⓘ Jung-gu NERFINISHED ⓘ |
| country | South Korea ⓘ |
| direction | north–south ⓘ |
| electrification | 750 V DC third rail ⓘ |
| fareSystem | integrated metropolitan fare system ⓘ |
| hasSection |
Korail-operated Ansan and Suwon extension
ⓘ
Seoul Metro-operated urban section ⓘ |
| interchangeWith |
Seoul Subway Line 1
NERFINISHED
ⓘ
Seoul Subway Line 2 NERFINISHED ⓘ Seoul Subway Line 3 NERFINISHED ⓘ Seoul Subway Line 5 NERFINISHED ⓘ Seoul Subway Line 7 NERFINISHED ⓘ Seoul Subway Line 9 NERFINISHED ⓘ |
| lineColor | light blue ⓘ |
| lineNumber | 4 ⓘ |
| locatedIn |
Gyeonggi Province
NERFINISHED
ⓘ
Seoul NERFINISHED ⓘ |
| notableFunction |
connects central Seoul with southwestern suburbs
ⓘ
provides access to major commercial and shopping districts in central Seoul ⓘ |
| numberOfTracks | 2 ⓘ |
| opened | 1985 ⓘ |
| operator |
Korail
NERFINISHED
ⓘ
Seoul Metro NERFINISHED ⓘ |
| partOf | Seoul Metropolitan Subway NERFINISHED ⓘ |
| passesThrough |
Chungmuro Station
NERFINISHED
ⓘ
Dongdaemun History & Culture Park Station NERFINISHED ⓘ Geumjeong Station NERFINISHED ⓘ Hoehyeon Station NERFINISHED ⓘ Myeong-dong Station NERFINISHED ⓘ Sadang Station NERFINISHED ⓘ Seoul Station NERFINISHED ⓘ Suwon Station NERFINISHED ⓘ |
| rollingStock |
Korail Class 341000 trains
NERFINISHED
ⓘ
Seoul Metro Line 4 trains NERFINISHED ⓘ |
| serviceType | heavy rail ⓘ |
| terminus |
Danggogae Station
NERFINISHED
ⓘ
Oido Station NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
| usesTicketing | contactless smart card (T-money and compatible cards) ⓘ |
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: Seoul Subway Line 4 Description of subject: Seoul Subway Line 4 is a major north–south rapid transit line in the Seoul Metropolitan Subway system, connecting central districts like Jongno-gu with outlying areas and key hubs such as Sadang, Suwon, and Danggogae.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject surface form:
Jongno-gu