Seibu Kokubunji Line
E1043198
The Seibu Kokubunji Line is a commuter railway line in western Tokyo operated by Seibu Railway, connecting residential suburbs with major transit hubs.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Seibu Kokubunji Line canonical | 5 |
| 西武国分寺線 | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10359210 — 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: Seibu Kokubunji Line Context triple: [Kokubunji, railwayLine, Seibu Kokubunji Line]
-
A.
Seibu Toshima Line
The Seibu Toshima Line is a short commuter railway line in Tokyo, Japan, operated by Seibu Railway and connecting Nerima and Toshimaen in the city’s northwest.
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B.
Seibu Yurakucho Line
The Seibu Yurakucho Line is a commuter railway line in Tokyo operated by Seibu Railway, linking the Seibu Ikebukuro Line with central Tokyo subway networks.
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C.
Seibu Ikebukuro Line
The Seibu Ikebukuro Line is a major private railway line in the Tokyo area operated by Seibu Railway, connecting Ikebukuro in central Tokyo with suburban destinations in Saitama Prefecture.
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D.
Rinkai Line
The Rinkai Line is a Tokyo railway line that connects central Tokyo with the waterfront Odaiba area and other bayside districts.
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E.
Seibu Shinjuku Line
The Seibu Shinjuku Line is a major private railway line in the Tokyo area operated by Seibu Railway, connecting Seibu-Shinjuku Station in central Tokyo with suburban cities in western Tokyo and Saitama Prefecture.
- 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: Seibu Kokubunji Line Target entity description: The Seibu Kokubunji Line is a commuter railway line in western Tokyo operated by Seibu Railway, connecting residential suburbs with major transit hubs.
-
A.
Seibu Toshima Line
The Seibu Toshima Line is a short commuter railway line in Tokyo, Japan, operated by Seibu Railway and connecting Nerima and Toshimaen in the city’s northwest.
-
B.
Seibu Yurakucho Line
The Seibu Yurakucho Line is a commuter railway line in Tokyo operated by Seibu Railway, linking the Seibu Ikebukuro Line with central Tokyo subway networks.
-
C.
Seibu Ikebukuro Line
The Seibu Ikebukuro Line is a major private railway line in the Tokyo area operated by Seibu Railway, connecting Ikebukuro in central Tokyo with suburban destinations in Saitama Prefecture.
-
D.
Rinkai Line
The Rinkai Line is a Tokyo railway line that connects central Tokyo with the waterfront Odaiba area and other bayside districts.
-
E.
Seibu Shinjuku Line
The Seibu Shinjuku Line is a major private railway line in the Tokyo area operated by Seibu Railway, connecting Seibu-Shinjuku Station in central Tokyo with suburban cities in western Tokyo and Saitama Prefecture.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
railway line in Japan ⓘ |
| category |
Seibu Railway lines
ⓘ
rail transport in Tokyo ⓘ |
| connects |
major transit hubs in Tokyo
ⓘ
residential suburbs of western Tokyo ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| electrificationSystem | overhead line ⓘ |
| fareSystem | integrated with Seibu Railway fare system ⓘ |
| hasOperatorHeadquarters | Tokorozawa, Saitama Prefecture ⓘ |
| locatedIn |
Japan
ⓘ
Tokyo ⓘ |
| operator | Seibu Railway ⓘ |
| owner | Seibu Railway ⓘ |
| partOfNetwork | Seibu Railway network ⓘ |
| primaryUse | passenger transport ⓘ |
| railwayGauge | 1,067 mm ⓘ |
| regionServed | western Tokyo ⓘ |
| rollingStockType | electric multiple units ⓘ |
| servicePattern |
all-stations (local) services
ⓘ
through services to other Seibu lines ⓘ |
| serviceType | commuter rail ⓘ |
| ticketing | supports IC cards such as Suica and PASMO ⓘ |
| trackConfiguration | double track (predominantly) ⓘ |
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: Seibu Kokubunji Line Description of subject: The Seibu Kokubunji Line is a commuter railway line in western Tokyo operated by Seibu Railway, connecting residential suburbs with major transit hubs.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Seibu Kokubunji Line