Sōbu Line
E341964
The Sōbu Line is a major Japan Railways (JR) commuter and intercity railway line in the Tokyo–Chiba area, connecting central Tokyo with eastern suburbs and cities in Chiba Prefecture.
All labels observed (3)
| Label | Occurrences |
|---|---|
| JR Sōbu Line | 1 |
| Sōbu Line canonical | 1 |
| Sōbu Main Line | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1603470 — 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: Sōbu Line Context triple: [Shinjuku Station, servedByLine, Sōbu Line]
-
A.
Yamatoji Line
The Yamatoji Line is a railway line in Japan operated by JR West that connects Osaka with Nara, serving as a key commuter and intercity route in the Kansai region.
-
B.
Sakaisuji Line
The Sakaisuji Line is a rapid transit line in Osaka, Japan, forming part of the Osaka Metro network and connecting key districts through north–south underground service.
-
C.
Sennichimae Line
The Sennichimae Line is a rapid transit line in Osaka, Japan, forming part of the city’s urban subway network.
-
D.
Shinetsu Main Line
The Shinetsu Main Line is a major railway line in Japan operated by JR East that historically connected the Tokyo region with Niigata Prefecture across central Honshu.
-
E.
Imazatosuji Line
The Imazatosuji Line is a rapid transit line in Osaka, Japan, operated by Osaka Metro and serving as one of the city’s main north–south subway corridors.
- 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: Sōbu Line Target entity description: The Sōbu Line is a major Japan Railways (JR) commuter and intercity railway line in the Tokyo–Chiba area, connecting central Tokyo with eastern suburbs and cities in Chiba Prefecture.
-
A.
Yamatoji Line
The Yamatoji Line is a railway line in Japan operated by JR West that connects Osaka with Nara, serving as a key commuter and intercity route in the Kansai region.
-
B.
Sakaisuji Line
The Sakaisuji Line is a rapid transit line in Osaka, Japan, forming part of the Osaka Metro network and connecting key districts through north–south underground service.
-
C.
Sennichimae Line
The Sennichimae Line is a rapid transit line in Osaka, Japan, forming part of the city’s urban subway network.
-
D.
Shinetsu Main Line
The Shinetsu Main Line is a major railway line in Japan operated by JR East that historically connected the Tokyo region with Niigata Prefecture across central Honshu.
-
E.
Imazatosuji Line
The Imazatosuji Line is a rapid transit line in Osaka, Japan, operated by Osaka Metro and serving as one of the city’s main north–south subway corridors.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
commuter rail line
ⓘ
intercity rail line ⓘ railway line ⓘ |
| connects |
central Tokyo
ⓘ
cities in Chiba Prefecture ⓘ |
| connectsWith |
Chūō Line (Rapid)
NERFINISHED
ⓘ
Keisei Main Line NERFINISHED ⓘ Keiyō Line NERFINISHED ⓘ Yamanote Line NERFINISHED ⓘ Yokosuka Line NERFINISHED ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| hasColor |
dark blue
ⓘ
yellow ⓘ |
| hasSection |
Chūō–Sōbu Line
NERFINISHED
ⓘ
Sōbu Main Line NERFINISHED ⓘ |
| hasService |
Shiosai limited express
ⓘ
surface form:
Ayame limited express
Narita Express ⓘ Shiosai limited express ⓘ Shiosai limited express ⓘ
surface form:
Wakashio limited express
commuter rapid service ⓘ rapid service ⓘ |
| hasServiceType |
limited express
ⓘ
local ⓘ rapid ⓘ |
| lineSymbol |
JB
ⓘ
JO ⓘ |
| locatedIn |
Chiba Prefecture
NERFINISHED
ⓘ
Japan ⓘ Tokyo Prefecture ⓘ |
| opened | 1894 ⓘ |
| operator |
East Japan Railway Company
ⓘ
East Japan Railway Company ⓘ
surface form:
JR East
|
| owner | East Japan Railway Company ⓘ |
| partOf |
JR East rail lines
ⓘ
surface form:
JR East network
|
| region | Kantō region ⓘ |
| serves |
Chiba
NERFINISHED
ⓘ
Chiba Prefecture NERFINISHED ⓘ Tokyo ⓘ eastern suburbs of Tokyo ⓘ |
| terminus |
Chiba Station
NERFINISHED
ⓘ
Chōshi Station NERFINISHED ⓘ Tokyo Station NERFINISHED ⓘ |
| trackGauge | 1,067 mm ⓘ |
| usesRollingStock |
255 series
ⓘ
E217 series ⓘ E231 series EMU ⓘ
surface form:
E231 series
E235 series EMU ⓘ
surface form:
E235 series
E257 series ⓘ E259 series EMU ⓘ
surface form:
E259 series
|
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: Sōbu Line Description of subject: The Sōbu Line is a major Japan Railways (JR) commuter and intercity railway line in the Tokyo–Chiba area, connecting central Tokyo with eastern suburbs and cities in Chiba Prefecture.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
JR Sōbu Line
this entity surface form:
Sōbu Main Line