Chūō-Sōbu Line
E690683
The Chūō-Sōbu Line is a busy commuter rail line in Tokyo and Chiba, Japan, running local services that connect central Tokyo with its western suburbs and eastern neighboring prefecture.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Chūō-Sōbu Line canonical | 22 |
| Chūō–Sōbu Line | 2 |
| Chūō Line | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5676916 — 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: Chūō-Sōbu Line Context triple: [E231 series EMU, usedOnLine, Chūō-Sōbu Line]
-
A.
Chūō Main Line
The Chūō Main Line is a major Japanese railway line operated by JR that runs through central Tokyo and connects the capital with inland regions such as Nagano via key urban hubs.
-
B.
Tōzai Line
The Tōzai Line is an east–west rapid transit line forming part of the Kyoto Municipal Subway system in Kyoto, Japan.
-
C.
Nippō Main Line
The Nippō Main Line is a major railway line in Kyushu, Japan, operated by JR Kyushu and running along the eastern coast to connect key cities including Beppu, Oita, and Miyazaki.
-
D.
Keiyō Line
The Keiyō Line is a JR East railway line in the Tokyo area that runs along Tokyo Bay, connecting central Tokyo with destinations such as Maihama (Tokyo Disney Resort) and Chiba.
-
E.
Chuo Line
The Chuo Line is a major rapid transit line in the Osaka Metro system that runs east–west through central Osaka, connecting key commercial and residential districts.
- 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: Chūō-Sōbu Line Target entity description: The Chūō-Sōbu Line is a busy commuter rail line in Tokyo and Chiba, Japan, running local services that connect central Tokyo with its western suburbs and eastern neighboring prefecture.
-
A.
Chūō Main Line
The Chūō Main Line is a major Japanese railway line operated by JR that runs through central Tokyo and connects the capital with inland regions such as Nagano via key urban hubs.
-
B.
Tōzai Line
The Tōzai Line is an east–west rapid transit line forming part of the Kyoto Municipal Subway system in Kyoto, Japan.
-
C.
Nippō Main Line
The Nippō Main Line is a major railway line in Kyushu, Japan, operated by JR Kyushu and running along the eastern coast to connect key cities including Beppu, Oita, and Miyazaki.
-
D.
Keiyō Line
The Keiyō Line is a JR East railway line in the Tokyo area that runs along Tokyo Bay, connecting central Tokyo with destinations such as Maihama (Tokyo Disney Resort) and Chiba.
-
E.
Chuo Line
The Chuo Line is a major rapid transit line in the Osaka Metro system that runs east–west through central Osaka, connecting key commercial and residential districts.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
JR East line
ⓘ
commuter rail line ⓘ railway line in Japan ⓘ |
| category | urban rail ⓘ |
| connects |
Chiba Prefecture
NERFINISHED
ⓘ
central Tokyo ⓘ western suburbs of Tokyo ⓘ |
| country | Japan ⓘ |
| electrification | overhead catenary ⓘ |
| electrificationType | electric multiple unit operation ⓘ |
| fareMedium |
IC cards
ⓘ
magnetic tickets ⓘ |
| fareSystem | JR East fare system ⓘ |
| hasFeature |
platform screen doors at some stations
ⓘ
women-only cars during peak periods on some trains ⓘ |
| hasService |
all-day operation
ⓘ
direct access to central Tokyo business districts ⓘ frequent trains during peak hours ⓘ through services with other JR East lines ⓘ weekday peak-hour crowding ⓘ |
| languageOfSignage |
English
ⓘ
Japanese ⓘ |
| lineColor | yellow ⓘ |
| lineType | heavy rail ⓘ |
| locatedIn |
Chiba Prefecture
NERFINISHED
ⓘ
Tokyo ⓘ |
| networkRole | east–west cross-city corridor in Tokyo area ⓘ |
| operator |
East Japan Railway Company
ⓘ
JR East ⓘ
linked to:
East Japan Railway Company
|
| owner | East Japan Railway Company ⓘ |
| partOfNetwork | JR East urban network ⓘ |
| passengerService | commuter ⓘ |
| primaryUse | commuter traffic ⓘ |
| railwaySignageColor | yellow on JR route maps ⓘ |
| railwaySystem | Japanese National Railways successor network ⓘ |
| region | Kantō region ⓘ |
| safetySystem | automatic train stop systems ⓘ |
| servicePattern | all-stations local ⓘ |
| serviceType | local ⓘ |
| ticketing |
IC card compatible
ⓘ
Suica compatible ⓘ |
| trackGauge |
1,067 mm
ⓘ
Cape gauge ⓘ |
| trafficLevel | high passenger volume ⓘ |
| usesRollingStock |
E231 series EMU
ⓘ
E233 series EMU ⓘ |
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: Chūō-Sōbu Line Description of subject: The Chūō-Sōbu Line is a busy commuter rail line in Tokyo and Chiba, Japan, running local services that connect central Tokyo with its western suburbs and eastern neighboring prefecture.
Referenced by (25)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Chūō-Sōbu Line
linked to: Chūō-Sōbu Line
subject linked to:
Suginami, Tokyo, Japan
subject linked to:
Ichigaya
linked to: Chūō-Sōbu Line
subject linked to:
Ochanomizu Station on Sōbu Line (Rapid)
subject linked to:
Ochanomizu Station on Sōbu Line (Rapid)
subject linked to:
Shinanomachi