AREX rail line
E648392
The AREX rail line is a major South Korean airport railway connecting central Seoul with Incheon International Airport and Gimpo International Airport.
All labels observed (1)
| Label | Occurrences |
|---|---|
| AREX rail line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7206833 — 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 rail line Context triple: [Yeongjong Island, hasTransportInfrastructure, AREX rail line]
-
A.
M-1 Rail line
The M-1 Rail line is a modern streetcar system running along Woodward Avenue in Detroit, Michigan, designed to support downtown and Midtown transit and spur urban redevelopment.
-
B.
Arrow rail line
Arrow rail line is a passenger rail service in Southern California that connects Redlands with the broader regional rail network.
-
C.
Pangrango Line
The Pangrango Line is a passenger railway route in West Java, Indonesia, connecting Bogor with Sukabumi and serving as an important regional commuter and intercity link.
-
D.
PKM rail line
The PKM rail line is a regional railway in Poland’s Pomeranian Voivodeship that connects Gdańsk and surrounding areas, including key hubs such as Gdańsk Lech Wałęsa Airport.
-
E.
Westbahn railway line
The Westbahn railway line is a major Austrian rail route that connects Vienna with Salzburg and serves numerous cities and towns along its corridor.
- 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 rail line Target entity description: The AREX rail line is a major South Korean airport railway connecting central Seoul with Incheon International Airport and Gimpo International Airport.
-
A.
M-1 Rail line
The M-1 Rail line is a modern streetcar system running along Woodward Avenue in Detroit, Michigan, designed to support downtown and Midtown transit and spur urban redevelopment.
-
B.
Arrow rail line
Arrow rail line is a passenger rail service in Southern California that connects Redlands with the broader regional rail network.
-
C.
Pangrango Line
The Pangrango Line is a passenger railway route in West Java, Indonesia, connecting Bogor with Sukabumi and serving as an important regional commuter and intercity link.
-
D.
PKM rail line
The PKM rail line is a regional railway in Poland’s Pomeranian Voivodeship that connects Gdańsk and surrounding areas, including key hubs such as Gdańsk Lech Wałęsa Airport.
-
E.
Westbahn railway line
The Westbahn railway line is a major Austrian rail route that connects Vienna with Salzburg and serves numerous cities and towns along its corridor.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
airport rail link
ⓘ
railway line ⓘ |
| connectsWith |
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 ⓘ |
| country | South Korea ⓘ |
| electrification | AC 25 kV 60 Hz overhead line ⓘ |
| fareSystem | integrated with Seoul Metropolitan Subway fare system for all-stop trains ⓘ |
| fullLineOpening | 2010 ⓘ |
| hasStation |
Cheongna International City Station
NERFINISHED
ⓘ
Digital Media City Station NERFINISHED ⓘ Geombawi Station NERFINISHED ⓘ Gimpo International Airport Station NERFINISHED ⓘ Gongdeok Station NERFINISHED ⓘ Incheon International Airport Terminal 1 Station NERFINISHED ⓘ Incheon International Airport Terminal 2 Station NERFINISHED ⓘ Seoul Station NERFINISHED ⓘ Unseo Station NERFINISHED ⓘ Yeongjong Station NERFINISHED ⓘ |
| lineColor | sky blue ⓘ |
| lineLength | approximately 58 km ⓘ |
| locatedIn |
Incheon
NERFINISHED
ⓘ
Seoul NERFINISHED ⓘ |
| maximumSpeed | up to 120 km/h ⓘ |
| nativeName | 공항철도 NERFINISHED ⓘ |
| nativeNameLanguage | ko ⓘ |
| numberOfTracks | 2 ⓘ |
| 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 ⓘ |
| purpose | airport access railway ⓘ |
| regionServed | Seoul Capital Area NERFINISHED ⓘ |
| rollingStock |
AREX Class 1000 EMU
NERFINISHED
ⓘ
AREX Class 2000 EMU NERFINISHED ⓘ |
| servesAirport |
Gimpo International Airport
NERFINISHED
ⓘ
Incheon International Airport NERFINISHED ⓘ |
| serviceType |
all-stop service
ⓘ
express service ⓘ |
| terminus |
Incheon International Airport
NERFINISHED
ⓘ
Seoul Station NERFINISHED ⓘ |
| trackGauge | 1,435 mm ⓘ |
| website | https://www.arex.or.kr ⓘ |
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 rail line Description of subject: The AREX rail line is a major South Korean airport railway connecting 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.