AREX airport railroad
E470419
AREX airport railroad is a high-speed rail line in South Korea that links central Seoul with Incheon International Airport and Gimpo International Airport.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AREX airport railroad canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4794594 — 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: AREX airport railroad Context triple: [Incheon International Airport, connectedBy, AREX airport railroad]
-
A.
AA train
The AA train was a former New York City Subway service designation that preceded and was eventually replaced by the modern C train.
-
B.
Keikyū Airport Line
The Keikyū Airport Line is a railway line in the Tokyo area that provides direct train access between central Tokyo and Haneda Airport.
-
C.
AeroTrain
AeroTrain is an automated underground people mover system that transports passengers between terminals at Washington Dulles International Airport.
-
D.
Northstar commuter rail
Northstar commuter rail is a commuter train service in the Minneapolis–Saint Paul metropolitan area that connects downtown Minneapolis with northern suburbs and exurban communities.
-
E.
Central Subway
Central Subway is a light rail extension of San Francisco’s Muni Metro system that provides improved north–south transit service, including a key connection to the Chinatown neighborhood.
- 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: AREX airport railroad Target entity description: AREX airport railroad is a high-speed rail line in South Korea that links central Seoul with Incheon International Airport and Gimpo International Airport.
-
A.
AA train
The AA train was a former New York City Subway service designation that preceded and was eventually replaced by the modern C train.
-
B.
Keikyū Airport Line
The Keikyū Airport Line is a railway line in the Tokyo area that provides direct train access between central Tokyo and Haneda Airport.
-
C.
AeroTrain
AeroTrain is an automated underground people mover system that transports passengers between terminals at Washington Dulles International Airport.
-
D.
Northstar commuter rail
Northstar commuter rail is a commuter train service in the Minneapolis–Saint Paul metropolitan area that connects downtown Minneapolis with northern suburbs and exurban communities.
-
E.
Central Subway
Central Subway is a light rail extension of San Francisco’s Muni Metro system that provides improved north–south transit service, including a key connection to the Chinatown neighborhood.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
airport rail link
ⓘ
high-speed rail line ⓘ railway line ⓘ |
| abbreviation | AREX NERFINISHED ⓘ |
| connects |
Gimpo International Airport
NERFINISHED
ⓘ
Incheon International Airport NERFINISHED ⓘ central Seoul NERFINISHED ⓘ |
| country | South Korea ⓘ |
| electrification | 25 kV AC overhead line ⓘ |
| fareSystem | integrated with Seoul Metropolitan Subway ⓘ |
| fullLineOpening | 2010 ⓘ |
| gauge | standard gauge ⓘ |
| hasStation |
Cheongna International City Station
NERFINISHED
ⓘ
Digital Media City Station NERFINISHED ⓘ Geomam Station NERFINISHED ⓘ Geombawi Station NERFINISHED ⓘ Gimpo International Airport Station NERFINISHED ⓘ Gongdeok Station NERFINISHED ⓘ Gyeyang Station NERFINISHED ⓘ Incheon International Airport Terminal 1 Station NERFINISHED ⓘ Incheon International Airport Terminal 2 Station NERFINISHED ⓘ Seoul Station NERFINISHED ⓘ Unseo Station NERFINISHED ⓘ |
| languageOfName | Korean ⓘ |
| lineColor | sky blue ⓘ |
| locatedIn | Seoul NERFINISHED ⓘ |
| nativeName | 공항철도 NERFINISHED ⓘ |
| opened | 2007 ⓘ |
| openedSection |
Gimpo International Airport–Incheon International Airport section
NERFINISHED
ⓘ
Seoul Station–Gimpo International Airport section NERFINISHED ⓘ |
| operator | Airport Railroad Co., Ltd. NERFINISHED ⓘ |
| owner | Korea Rail Network Authority NERFINISHED ⓘ |
| partOf | Seoul Metropolitan Subway network NERFINISHED ⓘ |
| primaryFunction | airport access rail service ⓘ |
| purpose |
link central Seoul with Gimpo International Airport
ⓘ
link central Seoul with Incheon International Airport ⓘ |
| region | Seoul Capital Area NERFINISHED ⓘ |
| rollingStock | electric multiple units ⓘ |
| servesCity |
Incheon
NERFINISHED
ⓘ
Seoul NERFINISHED ⓘ |
| serviceType |
all-stop service
ⓘ
express service ⓘ |
| terminus |
Gimpo International Airport
NERFINISHED
ⓘ
Incheon International Airport NERFINISHED ⓘ Seoul Station 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: AREX airport railroad Description of subject: AREX airport railroad is a high-speed rail line in South Korea that links central Seoul with Incheon International Airport and Gimpo International Airport.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.