Incheon Airport Railroad (AREX)
E650914
Incheon Airport Railroad (AREX) is a rail line in South Korea that connects central Seoul with Incheon International Airport and Gimpo International Airport, providing fast airport rail service for travelers.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Incheon Airport Railroad (AREX) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7206859 — 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: Incheon Airport Railroad (AREX) Context triple: [Yeongjong Island, hasPublicTransport, Incheon Airport Railroad (AREX)]
-
A.
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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B.
Daejeon Metro
Daejeon Metro is the urban rapid transit system serving the city of Daejeon in South Korea.
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C.
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.
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D.
Busan Metro
Busan Metro is the rapid transit system serving the city of Busan, South Korea, providing extensive urban and suburban rail transportation across the metropolitan area.
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E.
Suin–Bundang Line
The Suin–Bundang Line is a major commuter rail line in the Seoul metropolitan area that connects southeastern Seoul with surrounding cities such as Seongnam, Yongin, and Suwon.
- 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: Incheon Airport Railroad (AREX) Target entity description: Incheon Airport Railroad (AREX) is a rail line in South Korea that connects central Seoul with Incheon International Airport and Gimpo International Airport, providing fast airport rail service for travelers.
-
A.
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.
-
B.
Daejeon Metro
Daejeon Metro is the urban rapid transit system serving the city of Daejeon in South Korea.
-
C.
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.
-
D.
Busan Metro
Busan Metro is the rapid transit system serving the city of Busan, South Korea, providing extensive urban and suburban rail transportation across the metropolitan area.
-
E.
Suin–Bundang Line
The Suin–Bundang Line is a major commuter rail line in the Seoul metropolitan area that connects southeastern Seoul with surrounding cities such as Seongnam, Yongin, and Suwon.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
airport rail link
ⓘ
commuter rail line ⓘ railway line in South Korea ⓘ |
| connectsCentralArea | central Seoul ⓘ |
| connectsWith |
AREX City Airport Terminal at Seoul Station
NERFINISHED
ⓘ
Gyeongui–Jungang Line NERFINISHED ⓘ Seoul Metropolitan Subway Line 1 NERFINISHED ⓘ Seoul Metropolitan Subway Line 2 NERFINISHED ⓘ Seoul Metropolitan Subway Line 4 NERFINISHED ⓘ Seoul Metropolitan Subway Line 5 NERFINISHED ⓘ Seoul Metropolitan Subway Line 6 NERFINISHED ⓘ Seoul Metropolitan Subway Line 9 NERFINISHED ⓘ Suin–Bundang Line NERFINISHED ⓘ |
| constructionStart | 2001 ⓘ |
| country | South Korea ⓘ |
| electrification | 25 kV AC overhead line ⓘ |
| fareSystem | integrated with Seoul Metropolitan Subway fare system ⓘ |
| fullLineOpeningDate | 2010-12-29 ⓘ |
| fullName | Incheon International Airport Railroad NERFINISHED ⓘ |
| hasFacility | in-town check-in at Seoul Station City Airport Terminal ⓘ |
| hasRollingStock | electric multiple units ⓘ |
| intermediateStation | Gimpo International Airport Station NERFINISHED ⓘ |
| languageOfSignage |
Chinese
ⓘ
English ⓘ Japanese ⓘ Korean ⓘ |
| locale | Seoul Metropolitan Area NERFINISHED ⓘ |
| openingDate | 2007-03-23 ⓘ |
| operator | Airport Railroad Co., Ltd. NERFINISHED ⓘ |
| owner | Republic of Korea NERFINISHED ⓘ |
| primaryFunction | fast rail link between central Seoul and Incheon International Airport ⓘ |
| providesService |
all-stop trains serving intermediate stations
ⓘ
non-stop express trains between Seoul Station and Incheon International Airport ⓘ |
| purpose | airport access for travelers ⓘ |
| railGauge | standard gauge ⓘ |
| region |
Gyeonggi Province
NERFINISHED
ⓘ
Incheon NERFINISHED ⓘ |
| servesAirport |
Gimpo International Airport
NERFINISHED
ⓘ
Incheon International Airport NERFINISHED ⓘ |
| servesCity | Seoul NERFINISHED ⓘ |
| serviceType |
all-stop service
ⓘ
express service ⓘ |
| shortName | AREX NERFINISHED ⓘ |
| terminusStation |
Incheon International Airport Terminal 1 Station
NERFINISHED
ⓘ
Incheon International Airport Terminal 2 Station NERFINISHED ⓘ Seoul Station NERFINISHED ⓘ |
| ticketType |
T-money compatible
ⓘ
single-journey ticket ⓘ |
| timeZone | Korea Standard Time NERFINISHED ⓘ |
| trackConfiguration | double track ⓘ |
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: Incheon Airport Railroad (AREX) Description of subject: Incheon Airport Railroad (AREX) is a rail line in South Korea that connects central Seoul with Incheon International Airport and Gimpo International Airport, providing fast airport rail service for travelers.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.