Seoul Subway Line 9
E416274
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.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Seoul Subway Line 9 canonical | 8 |
| Seoul Metro Line 9 stations | 1 |
| Seoul Metropolitan Subway Line 9 (extension planned) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4114603 — 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 9 Context triple: [Yeouido-dong, transportServedBy, Seoul Subway Line 9]
-
A.
Seoul Metropolitan Subway
The Seoul Metropolitan Subway is an extensive rapid transit network serving Seoul and its surrounding metropolitan area, known for its high efficiency, cleanliness, and technological sophistication.
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B.
Incheon Subway
Incheon Subway is the urban rapid transit system serving the city of Incheon, South Korea, connecting major districts and linking with the Seoul Metropolitan Subway network.
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C.
Gwangju Metro
Gwangju Metro is the urban rapid transit system serving the city of Gwangju in South Korea.
-
D.
Daejeon Metro
Daejeon Metro is the urban rapid transit system serving the city of Daejeon in South Korea.
-
E.
Daegu Metro
Daegu Metro is the urban rapid transit system serving the city of Daegu in South Korea, providing high-capacity rail transportation across the metropolitan area.
- 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 9 Target entity description: 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.
-
A.
Seoul Metropolitan Subway
The Seoul Metropolitan Subway is an extensive rapid transit network serving Seoul and its surrounding metropolitan area, known for its high efficiency, cleanliness, and technological sophistication.
-
B.
Incheon Subway
Incheon Subway is the urban rapid transit system serving the city of Incheon, South Korea, connecting major districts and linking with the Seoul Metropolitan Subway network.
-
C.
Gwangju Metro
Gwangju Metro is the urban rapid transit system serving the city of Gwangju in South Korea.
-
D.
Daejeon Metro
Daejeon Metro is the urban rapid transit system serving the city of Daejeon in South Korea.
-
E.
Daegu Metro
Daegu Metro is the urban rapid transit system serving the city of Daegu in South Korea, providing high-capacity rail transportation across the metropolitan area.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
Seoul Metropolitan Subway line
ⓘ
rapid transit line ⓘ subway line ⓘ |
| character | underground ⓘ |
| color | gold ⓘ |
| connects |
Gangnam District
NERFINISHED
ⓘ
Gangseo District NERFINISHED ⓘ Seocho District NERFINISHED ⓘ Songpa District NERFINISHED ⓘ Yeongdeungpo District NERFINISHED ⓘ Yeouido NERFINISHED ⓘ |
| country | South Korea ⓘ |
| direction | east–west ⓘ |
| electrification | 1500 V DC overhead line ⓘ |
| fareSystem | integrated with Seoul Metropolitan Subway fare system ⓘ |
| hasSection |
Phase 1 section
ⓘ
Phase 2 section ⓘ Phase 3 section ⓘ |
| hasServiceType |
express service
ⓘ
local service ⓘ |
| hasTerminus |
Gaehwa station
ⓘ
VHS Medical Center station ⓘ |
| interchangeWith |
AREX
ⓘ
Seoul Subway Line 1 NERFINISHED ⓘ Seoul Subway Line 2 NERFINISHED ⓘ Seoul Subway Line 3 NERFINISHED ⓘ Seoul Subway Line 4 NERFINISHED ⓘ Seoul Subway Line 5 NERFINISHED ⓘ Seoul Subway Line 7 NERFINISHED ⓘ Shinbundang Line NERFINISHED ⓘ Suin–Bundang Line NERFINISHED ⓘ |
| lineColor | brownish gold ⓘ |
| locatedIn | Seoul ⓘ |
| notableFeature | first line in Seoul to introduce large-scale express subway service ⓘ |
| numberOfTracks | 2 ⓘ |
| openingDate | 2009-07-24 ⓘ |
| operator |
Seoul Metro
NERFINISHED
ⓘ
Seoul Metro Line 9 Corporation ⓘ |
| owner | Seoul Metropolitan Government ⓘ |
| rollingStock |
Hyundai Rotem low-floor tram
ⓘ
surface form:
Hyundai Rotem metro trains
|
| safetySystem |
automatic train control
ⓘ
platform screen doors at all stations ⓘ |
| serves |
key business districts in Seoul
ⓘ
major residential areas in Seoul ⓘ |
| servicePattern |
express trains skip selected stations
ⓘ
local trains stop at all stations ⓘ |
| system | Seoul Metropolitan Subway NERFINISHED ⓘ |
| trackGauge | standard gauge ⓘ |
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 9 Description of subject: 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.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Seoul Metro Line 9 stations
this entity surface form:
Seoul Metropolitan Subway Line 9 (extension planned)