JR Yamanote Line
E23567
The JR Yamanote Line is a busy circular railway loop in central Tokyo that connects many of the city’s major urban hubs and transit interchanges.
All labels observed (12)
How this entity was disambiguated
This entity first appeared as the object of triple T186236 — 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: JR Yamanote Line Context triple: [Shibuya, Tokyo, Japan, servedByRailLine, JR Yamanote Line]
-
A.
JR Yumesaki Line
The JR Yumesaki Line is a railway line in Osaka, Japan, operated by JR West that connects central Osaka with the bay area, including major attractions such as Universal Studios Japan.
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B.
J train
The J train is a New York City Subway service that runs along the BMT Jamaica Line, connecting Jamaica, Queens with Lower Manhattan via Brooklyn.
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C.
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.
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D.
Congressional Limited Express
The Congressional Limited Express was a premier Pennsylvania Railroad passenger train that provided fast, luxurious service between New York City and Washington, D.C.
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E.
Osaka Metro
Osaka Metro is the rapid transit network serving Japan’s city of Osaka and its surrounding urban area.
- 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: JR Yamanote Line Target entity description: The JR Yamanote Line is a busy circular railway loop in central Tokyo that connects many of the city’s major urban hubs and transit interchanges.
-
A.
JR Yumesaki Line
The JR Yumesaki Line is a railway line in Osaka, Japan, operated by JR West that connects central Osaka with the bay area, including major attractions such as Universal Studios Japan.
-
B.
J train
The J train is a New York City Subway service that runs along the BMT Jamaica Line, connecting Jamaica, Queens with Lower Manhattan via Brooklyn.
-
C.
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.
-
D.
Congressional Limited Express
The Congressional Limited Express was a premier Pennsylvania Railroad passenger train that provided fast, luxurious service between New York City and Washington, D.C.
-
E.
Osaka Metro
Osaka Metro is the rapid transit network serving Japan’s city of Osaka and its surrounding urban area.
- F. None of above. chosen
Statements (57)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
railway line ⓘ urban rail loop line ⓘ |
| character |
elevated and surface
ⓘ
urban ⓘ |
| connects |
Akihabara Station
ⓘ
Gotanda Station ⓘ Hamamatsuchō Station ⓘ Harajuku Station ⓘ Ikebukuro Station ⓘ Kanda Station ⓘ Komagome Station ⓘ Meguro Station ⓘ Nippori Station ⓘ Osaki Station ⓘ Otsuka Station ⓘ Shibuya Station ⓘ Shin-Okachimachi area via transfer ⓘ Shin-Okubo Station ⓘ Shinagawa Station ⓘ Shinjuku Station ⓘ Sugamo Station ⓘ Tabata Station ⓘ Takadanobaba Station ⓘ Hamamatsuchō Station ⓘ
surface form:
Tamachi Station
Tokyo Station ⓘ Ueno Station ⓘ Harajuku Station ⓘ
surface form:
Yoyogi Station
Yurakucho Station ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| fareCardAccepted |
PASMO
ⓘ
Suica ⓘ |
| fareSystem | integrated with JR East fare network ⓘ |
| isCircular | true ⓘ |
| lineLength | approximately 34.5 km ⓘ |
| locatedIn |
Kantō region
ⓘ
Tokyo ⓘ |
| loopCompletion | 20th century ⓘ |
| loopType | railway loop line ⓘ |
| majorInterchangeRole |
connects multiple JR lines
ⓘ
connects multiple Tokyo Metro lines ⓘ connects multiple private railway lines ⓘ |
| notableFeature | one of the busiest railway lines in the world ⓘ |
| numberOfStations | 30 ⓘ |
| numberOfTracks | 2 ⓘ |
| openingPeriod | sections opened between late 19th and early 20th century ⓘ |
| operator |
East Japan Railway Company
ⓘ
East Japan Railway Company ⓘ
surface form:
JR East
|
| primaryFunction | urban commuter transport ⓘ |
| rollingStock |
E231-500 series EMU (historical and transitional use)
ⓘ
E235 series EMU ⓘ |
| serves | central Tokyo ⓘ |
| serviceFrequency | high-frequency all day ⓘ |
| servicePattern | all-stations stopping ⓘ |
| timeToCompleteLoop | about 60 minutes ⓘ |
| trackGauge | 1,067 mm ⓘ |
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: JR Yamanote Line Description of subject: The JR Yamanote Line is a busy circular railway loop in central Tokyo that connects many of the city’s major urban hubs and transit interchanges.
Referenced by (60)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Yamanote Line
this entity surface form:
Yamanote Line
this entity surface form:
Yamanote Line
this entity surface form:
Yamanote Line
this entity surface form:
Yamanote Line
this entity surface form:
Yamanote Line inner loop
this entity surface form:
Yamanote Line outer loop
this entity surface form:
JR Yamanote Line at Shinjuku Station