Sotobō Line
E691155
The Sotobō Line is a railway line in Chiba Prefecture, Japan, running along the Pacific coast of the Bōsō Peninsula and connecting suburban and regional communities with the greater Tokyo area.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sotobō Line canonical | 9 |
How this entity was disambiguated
This entity first appeared as the object of triple T5709172 — 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: Sotobō Line Context triple: [Boso Peninsula, hasTransportation, Sotobō Line]
-
A.
Karasuma Line
The Karasuma Line is a major Kyoto Municipal Subway line running north–south through Kyoto, connecting key districts and transportation hubs including Kyoto Station.
-
B.
Jōban Line
The Jōban Line is a major railway corridor in Japan operated by JR East, connecting central Tokyo with the northeastern Kanto and Tōhoku regions along the Pacific coast.
-
C.
Takasaki Line
The Takasaki Line is a major railway line in Japan operated by JR East that connects the Tokyo metropolitan area with Saitama and Gunma Prefectures, serving as an important commuter and intercity route.
-
D.
Tsuyama Line
The Tsuyama Line is a regional railway line in Okayama Prefecture, Japan, operated by JR West and known for connecting rural communities with the city of Tsuyama.
-
E.
Hanzōmon Line
The Hanzōmon Line is a Tokyo Metro subway line in Tokyo, Japan, connecting central districts with eastern and southwestern suburbs as part of the city’s urban rail network.
- 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: Sotobō Line Target entity description: The Sotobō Line is a railway line in Chiba Prefecture, Japan, running along the Pacific coast of the Bōsō Peninsula and connecting suburban and regional communities with the greater Tokyo area.
-
A.
Karasuma Line
The Karasuma Line is a major Kyoto Municipal Subway line running north–south through Kyoto, connecting key districts and transportation hubs including Kyoto Station.
-
B.
Jōban Line
The Jōban Line is a major railway corridor in Japan operated by JR East, connecting central Tokyo with the northeastern Kanto and Tōhoku regions along the Pacific coast.
-
C.
Takasaki Line
The Takasaki Line is a major railway line in Japan operated by JR East that connects the Tokyo metropolitan area with Saitama and Gunma Prefectures, serving as an important commuter and intercity route.
-
D.
Tsuyama Line
The Tsuyama Line is a regional railway line in Okayama Prefecture, Japan, operated by JR West and known for connecting rural communities with the city of Tsuyama.
-
E.
Hanzōmon Line
The Hanzōmon Line is a Tokyo Metro subway line in Tokyo, Japan, connecting central districts with eastern and southwestern suburbs as part of the city’s urban rail network.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
heavy rail
ⓘ
railway line ⓘ |
| connectsCity |
Chiba
ⓘ
Ichinomiya ⓘ Kamogawa ⓘ Katsuura ⓘ Mobara ⓘ Onjuku ⓘ Ōhara ⓘ
linked to:
Ohara
|
| connectsTo |
Keiyō Line
ⓘ
Sotobō Line ⓘ Sōbu Main Line ⓘ
linked to:
Sōbu Line
Uchibō Line ⓘ |
| country | Japan ⓘ |
| electrification | 1500 V DC overhead catenary ⓘ |
| electrificationCompleted | 20th century ⓘ |
| followsCoastOf | Pacific Ocean ⓘ |
| hasService |
Local trains
ⓘ
Wakashio limited express ⓘ
linked to:
Shiosai limited express
|
| hasThroughServiceTo |
Shinjuku Station (via Shinjuku–Sōbu Line routes)
ⓘ
linked to:
Odakyu Line at Shinjuku Station
Tokyo Station (via Sōbu Line Rapid) ⓘ
linked to:
Tokyo Station on the Tokaido Main Line
|
| locatedIn |
Chiba Prefecture
NERFINISHED
ⓘ
Honshu ⓘ |
| locatedInTimeZone | Japan Standard Time ⓘ |
| locatedOn | Bōsō Peninsula ⓘ |
| numberOfTracks |
double track (Chiba – Kazusa-Ichinomiya)
ⓘ
single track (Kazusa-Ichinomiya – Awa-Kamogawa) ⓘ |
| opened | late 19th century ⓘ |
| operator |
East Japan Railway Company
ⓘ
JR East ⓘ
linked to:
East Japan Railway Company
|
| owner | East Japan Railway Company ⓘ |
| partOfNetwork |
JR East network
ⓘ
linked to:
JR East rail lines
|
| primaryUse |
commuter transport
ⓘ
tourist access to Bōsō Peninsula ⓘ |
| regionServed |
Bōsō Peninsula
ⓘ
Greater Tokyo Area ⓘ
linked to:
Tokyo metropolitan area
|
| rollingStockUsed |
209 series EMU
ⓘ
E131 series EMU ⓘ
linked to:
E131 series
E233 series EMU ⓘ E257 series EMU ⓘ
linked to:
E257 series
|
| serviceType |
commuter rail
ⓘ
limited express ⓘ regional rail ⓘ |
| terminusStation |
Awa-Kamogawa Station
NERFINISHED
ⓘ
Chiba Station ⓘ |
| trackGauge |
1067 mm
ⓘ
Cape gauge ⓘ |
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: Sotobō Line Description of subject: The Sotobō Line is a railway line in Chiba Prefecture, Japan, running along the Pacific coast of the Bōsō Peninsula and connecting suburban and regional communities with the greater Tokyo area.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.