Keisei Electric Railway lines
E684093
Keisei Electric Railway lines are a group of private railway routes in the Greater Tokyo area best known for linking central Tokyo with Narita International Airport and serving commuter and interurban travel in Chiba Prefecture.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Keisei Electric Railway lines canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T7656541 — 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 Electric Railway lines Context triple: [Tokyo metropolitan rail network, includes, Keisei Electric Railway lines]
-
A.
Keio Line
The Keio Line is a major private railway line in Tokyo, Japan, operated by Keio Corporation, connecting central Tokyo with its western suburbs.
-
B.
Odakyu Electric Railway
Odakyu Electric Railway is a major private railway company in Japan that operates commuter and limited express train services connecting central Tokyo with surrounding suburban and regional areas.
-
C.
JR Saikyo Line
The JR Saikyo Line is a major commuter rail line in the Tokyo metropolitan area operated by JR East, connecting central Tokyo with Saitama Prefecture and serving key hubs such as Shibuya and Shinjuku.
-
D.
Tozai Line
The Tozai Line is a major Tokyo Metro subway line that runs east–west across Tokyo, connecting central business districts with suburban residential areas.
-
E.
Keio railway network
The Keio railway network is a private railway system in the Tokyo metropolitan area operated by Keio Corporation, linking central Tokyo with its western suburbs through multiple commuter lines.
- 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 Electric Railway lines Target entity description: Keisei Electric Railway lines are a group of private railway routes in the Greater Tokyo area best known for linking central Tokyo with Narita International Airport and serving commuter and interurban travel in Chiba Prefecture.
-
A.
Keio Line
The Keio Line is a major private railway line in Tokyo, Japan, operated by Keio Corporation, connecting central Tokyo with its western suburbs.
-
B.
Odakyu Electric Railway
Odakyu Electric Railway is a major private railway company in Japan that operates commuter and limited express train services connecting central Tokyo with surrounding suburban and regional areas.
-
C.
JR Saikyo Line
The JR Saikyo Line is a major commuter rail line in the Tokyo metropolitan area operated by JR East, connecting central Tokyo with Saitama Prefecture and serving key hubs such as Shibuya and Shinjuku.
-
D.
Tozai Line
The Tozai Line is a major Tokyo Metro subway line that runs east–west across Tokyo, connecting central business districts with suburban residential areas.
-
E.
Keio railway network
The Keio railway network is a private railway system in the Tokyo metropolitan area operated by Keio Corporation, linking central Tokyo with its western suburbs through multiple commuter lines.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail system
ⓘ
railway network ⓘ |
| airportAccessRole | major rail link between Tokyo and Narita Airport ⓘ |
| connects |
Narita International Airport
NERFINISHED
ⓘ
central Tokyo NERFINISHED ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| fareSystem | integrated with IC cards such as Suica and PASMO ⓘ |
| gauge | 1,435 mm standard gauge ⓘ |
| hasLine |
Keisei Chihara Line
NERFINISHED
ⓘ
Keisei Higashi-Narita Line NERFINISHED ⓘ Keisei Kanamachi Line NERFINISHED ⓘ Keisei Main Line NERFINISHED ⓘ Keisei Oshiage Line NERFINISHED ⓘ Narita Sky Access Line NERFINISHED ⓘ |
| headquartersLocation | Ichikawa, Chiba Prefecture NERFINISHED ⓘ |
| locatedIn |
Chiba Prefecture
NERFINISHED
ⓘ
Greater Tokyo Area NERFINISHED ⓘ Tokyo Prefecture NERFINISHED ⓘ |
| notableService |
Access Express
NERFINISHED
ⓘ
Skyliner NERFINISHED ⓘ |
| notableStation |
Keisei Ueno Station
NERFINISHED
ⓘ
Narita Airport Terminal 1 Station NERFINISHED ⓘ Narita Airport Terminal 2·3 Station NERFINISHED ⓘ Nippori Station NERFINISHED ⓘ |
| openingPeriod | early 20th century ⓘ |
| operator | Keisei Electric Railway NERFINISHED ⓘ |
| partOf | Keisei Group NERFINISHED ⓘ |
| primaryUse |
airport rail link
ⓘ
commuter rail ⓘ |
| regionServed |
eastern Tokyo
ⓘ
northwestern Chiba Prefecture ⓘ |
| rollingStockType | electric multiple units ⓘ |
| safetySystem |
Automatic Train Control
ⓘ
Automatic Train Stop NERFINISHED ⓘ |
| serves |
Narita International Airport
NERFINISHED
ⓘ
commuter traffic ⓘ interurban travel ⓘ |
| servicePattern |
limited express services
ⓘ
local trains ⓘ rapid services ⓘ |
| throughServicesWith |
Keikyu Main Line
NERFINISHED
ⓘ
Toei Asakusa Line NERFINISHED ⓘ |
| ticketing | reserved-seat services available on Skyliner ⓘ |
| trackOwnership | mostly 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: Keisei Electric Railway lines Description of subject: Keisei Electric Railway lines are a group of private railway routes in the Greater Tokyo area best known for linking central Tokyo with Narita International Airport and serving commuter and interurban travel in Chiba Prefecture.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.