Sendai Subway
E281409
Sendai Subway is an urban rapid transit system serving the city of Sendai in Japan, providing key north–south and east–west rail connections across the metropolitan area.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Sendai Subway canonical | 8 |
| Sendai Subway Namboku Line | 5 |
| Sendai Subway Nanboku Line | 1 |
| Sendai Subway system | 1 |
| Sendai public transit network | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2565546 — 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: Sendai Subway Context triple: [Katahira Campus, hasNearbyTransport, Sendai Subway]
-
A.
Toei Subway
Toei Subway is one of Tokyo's two main subway networks, operated by the Tokyo Metropolitan Bureau of Transportation and serving numerous urban and suburban areas across the city.
-
B.
Sapporo Municipal Subway
Sapporo Municipal Subway is the rapid transit system serving the city of Sapporo in Hokkaido, Japan, providing urban rail transportation across several key lines and stations.
-
C.
Tokyo Metro
Tokyo Metro is one of the two main rapid transit operators in Tokyo, running an extensive network of subway lines that serve the city’s central and metropolitan areas.
-
D.
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.
-
E.
Osaka Monorail
Osaka Monorail is a straddle-beam monorail system in Osaka Prefecture, Japan, serving as a major urban transit line linking key suburbs, commercial areas, and transport hubs.
- 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: Sendai Subway Target entity description: Sendai Subway is an urban rapid transit system serving the city of Sendai in Japan, providing key north–south and east–west rail connections across the metropolitan area.
-
A.
Toei Subway
Toei Subway is one of Tokyo's two main subway networks, operated by the Tokyo Metropolitan Bureau of Transportation and serving numerous urban and suburban areas across the city.
-
B.
Sapporo Municipal Subway
Sapporo Municipal Subway is the rapid transit system serving the city of Sapporo in Hokkaido, Japan, providing urban rail transportation across several key lines and stations.
-
C.
Tokyo Metro
Tokyo Metro is one of the two main rapid transit operators in Tokyo, running an extensive network of subway lines that serve the city’s central and metropolitan areas.
-
D.
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.
-
E.
Osaka Monorail
Osaka Monorail is a straddle-beam monorail system in Osaka Prefecture, Japan, serving as a major urban transit line linking key suburbs, commercial areas, and transport hubs.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
metro system
ⓘ
public transport system ⓘ rapid transit system ⓘ |
| acceptsICCard |
PASMO
ⓘ
Suica ⓘ other interoperable IC transit cards in Japan ⓘ |
| connectsWith |
JR East lines in Sendai
ⓘ
Sendai Station ⓘ |
| country | Japan ⓘ |
| electrificationSystem | overhead line ⓘ |
| fareSystem | distance-based fare ⓘ |
| gauge | 1,067 mm ⓘ |
| hasAccessibilityFeature |
elevators at many stations
ⓘ
escalators at many stations ⓘ tactile paving on platforms ⓘ |
| hasColorCode |
blue for Tōzai Line
ⓘ
green for Namboku Line ⓘ |
| hasFeature |
air-conditioned trains
ⓘ
platform screen doors on many stations ⓘ |
| hasLine |
Sendai Subway Namboku Line
ⓘ
linked to:
Sendai Subway
Sendai Subway Tōzai Line ⓘ |
| hasRollingStock |
Sendai Subway 1000 series
ⓘ
Sendai Subway 2000 series ⓘ Sendai Subway 3000 series ⓘ |
| hasService | all-stations stopping service ⓘ |
| isPartOf | public transportation in Sendai ⓘ |
| languageOfSignage |
English
ⓘ
Japanese ⓘ |
| locatedIn |
Miyagi Prefecture
ⓘ
Sendai ⓘ Tōhoku region ⓘ
linked to:
Tohoku
|
| networkType | underground railway ⓘ |
| openedLine |
Sendai Subway Namboku Line
ⓘ
linked to:
Sendai Subway
Sendai Subway Tōzai Line ⓘ |
| operator | Sendai City Transportation Bureau ⓘ |
| owner | Sendai City Transportation Bureau ⓘ |
| primaryDirectionCoverage |
east–west
ⓘ
north–south ⓘ |
| purpose | urban mass transit ⓘ |
| regionServed |
central Sendai
ⓘ
suburban areas of Sendai ⓘ |
| safetySystem |
automatic train control
ⓘ
automatic train protection ⓘ |
| serves | Sendai metropolitan area ⓘ |
| ticketing |
IC cards
ⓘ
magnetic tickets ⓘ |
| transportMode | rail ⓘ |
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: Sendai Subway Description of subject: Sendai Subway is an urban rapid transit system serving the city of Sendai in Japan, providing key north–south and east–west rail connections across the metropolitan area.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Sendai Subway
linked to: Sendai Subway
linked to: Sendai Subway
linked to: Sendai Subway
linked to: Sendai Subway
linked to: Sendai Subway
linked to: Sendai Subway
linked to: Sendai Subway