Keisei Main Line (airport access branch)
E730369
The Keisei Main Line (airport access branch) is a rail route in Japan operated by Keisei Electric Railway that provides direct train services between central Tokyo and Narita International Airport.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Keisei Main Line (airport access branch) canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T8363237 — 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: Keisei Main Line (airport access branch) Context triple: [Narita Airport Terminal 1 Station, railwayLine, Keisei Main Line (airport access branch)]
-
A.
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.
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B.
Narita Line (urban section)
Narita Line (urban section) is a commuter rail line in the Greater Tokyo area operated by JR East, connecting central Chiba with Narita and serving as part of the region’s urban rail network.
-
C.
Tōkyū Ōimachi Line
The Tōkyū Ōimachi Line is a major commuter railway line in Tokyo operated by Tokyu Corporation, connecting central Tokyo areas such as Ōimachi and Futako-Tamagawa with surrounding residential districts.
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D.
Tobu Isesaki Line
The Tobu Isesaki Line is a major private railway line in the Greater Tokyo area operated by Tobu Railway, connecting central Tokyo with Saitama and Gunma Prefectures.
-
E.
Tōkyū Ikegami Line
The Tōkyū Ikegami Line is a commuter railway line in Tokyo operated by Tokyu Corporation, connecting residential areas in Ōta Ward with central districts such as Shinagawa.
- 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: Keisei Main Line (airport access branch) Target entity description: The Keisei Main Line (airport access branch) is a rail route in Japan operated by Keisei Electric Railway that provides direct train services between central Tokyo and Narita International Airport.
-
A.
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.
-
B.
Narita Line (urban section)
Narita Line (urban section) is a commuter rail line in the Greater Tokyo area operated by JR East, connecting central Chiba with Narita and serving as part of the region’s urban rail network.
-
C.
Tōkyū Ōimachi Line
The Tōkyū Ōimachi Line is a major commuter railway line in Tokyo operated by Tokyu Corporation, connecting central Tokyo areas such as Ōimachi and Futako-Tamagawa with surrounding residential districts.
-
D.
Tobu Isesaki Line
The Tobu Isesaki Line is a major private railway line in the Greater Tokyo area operated by Tobu Railway, connecting central Tokyo with Saitama and Gunma Prefectures.
-
E.
Tōkyū Ikegami Line
The Tōkyū Ikegami Line is a commuter railway line in Tokyo operated by Tokyu Corporation, connecting residential areas in Ōta Ward with central districts such as Shinagawa.
- F. None of above. chosen
Statements (37)
| Predicate | Object |
|---|---|
| instanceOf |
airport rail link
ⓘ
railway line ⓘ |
| category |
Airport rail links in Japan
ⓘ
Rail transport in Chiba Prefecture ⓘ Rail transport in Tokyo ⓘ |
| connectsStation |
Keisei Ueno Station
NERFINISHED
ⓘ
Narita Airport Terminal 1 Station NERFINISHED ⓘ Narita Airport Terminal 2·3 Station NERFINISHED ⓘ Nippori Station NERFINISHED ⓘ |
| connectsTo |
Narita International Airport
NERFINISHED
ⓘ
central Tokyo ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| fareSystem | integrated with Keisei Electric Railway fare system ⓘ |
| gauge | 1,435 mm standard gauge ⓘ |
| hasServiceBrand |
Access Express
NERFINISHED
ⓘ
Skyliner NERFINISHED ⓘ |
| locatedIn |
Chiba Prefecture
NERFINISHED
ⓘ
Tokyo Metropolis NERFINISHED ⓘ |
| openedForAirportAccess | 20th century ⓘ |
| operator | Keisei Electric Railway NERFINISHED ⓘ |
| owner | Keisei Electric Railway NERFINISHED ⓘ |
| partOf | Keisei Main Line NERFINISHED ⓘ |
| primaryFunction | airport access ⓘ |
| railwaySignalling | automatic signalling ⓘ |
| safetySystem | ATS (Automatic Train Stop) NERFINISHED ⓘ |
| serves |
Narita International Airport Terminal 1
NERFINISHED
ⓘ
Narita International Airport Terminal 2·3 NERFINISHED ⓘ |
| serviceType |
commuter rail
ⓘ
limited express ⓘ |
| ticketing | accepts IC cards such as Suica and PASMO ⓘ |
| trackConfiguration | double track on most sections ⓘ |
| usesRollingStock |
Keisei 3000 series EMU
NERFINISHED
ⓘ
Keisei 3050 series EMU NERFINISHED ⓘ Keisei 3400 series EMU NERFINISHED ⓘ Keisei 3700 series EMU NERFINISHED ⓘ Keisei AE series EMU NERFINISHED ⓘ |
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: Keisei Main Line (airport access branch) Description of subject: The Keisei Main Line (airport access branch) is a rail route in Japan operated by Keisei Electric Railway that provides direct train services between central Tokyo and Narita International Airport.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.