Narita Line
E820785
The Narita Line is a railway line in Japan operated by JR East that connects Chiba Prefecture with Narita and its surrounding areas, serving both local commuters and access to Narita International Airport via connecting services.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Narita Line canonical | 1 |
| Narita Line (Airport Branch) | 1 |
| Narita Line (JR East) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6199480 — 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: Narita Line Context triple: [E235 series EMU, usedOnLine, Narita Line]
-
A.
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.
-
B.
Yokosuka Line
The Yokosuka Line is a major JR East railway line in the Greater Tokyo area that connects central Tokyo with Yokosuka in Kanagawa Prefecture, serving both commuter and intercity traffic.
-
C.
Seto-Ōhashi Line
The Seto-Ōhashi Line is a railway route in Japan that connects Honshu and Shikoku across the Seto Inland Sea, forming the rail link over the Great Seto Bridge system.
-
D.
Keikyū Main Line
The Keikyū Main Line is a major private railway line in the Greater Tokyo area of Japan, operated by Keikyu Corporation and serving as a key commuter route between central Tokyo and cities in Kanagawa Prefecture.
-
E.
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.
- 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: Narita Line Target entity description: The Narita Line is a railway line in Japan operated by JR East that connects Chiba Prefecture with Narita and its surrounding areas, serving both local commuters and access to Narita International Airport via connecting services.
-
A.
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.
-
B.
Yokosuka Line
The Yokosuka Line is a major JR East railway line in the Greater Tokyo area that connects central Tokyo with Yokosuka in Kanagawa Prefecture, serving both commuter and intercity traffic.
-
C.
Seto-Ōhashi Line
The Seto-Ōhashi Line is a railway route in Japan that connects Honshu and Shikoku across the Seto Inland Sea, forming the rail link over the Great Seto Bridge system.
-
D.
Keikyū Main Line
The Keikyū Main Line is a major private railway line in the Greater Tokyo area of Japan, operated by Keikyu Corporation and serving as a key commuter route between central Tokyo and cities in Kanagawa Prefecture.
-
E.
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.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
rail transport infrastructure
ⓘ
railway line ⓘ |
| connects |
Chiba Prefecture
NERFINISHED
ⓘ
Narita area NERFINISHED ⓘ |
| country | Japan ⓘ |
| electrification | 1,500 V DC overhead catenary ⓘ |
| fareSystem | JR East fare system ⓘ |
| gauge |
1,067 mm
ⓘ
Cape gauge ⓘ |
| hasCategory |
Lines of East Japan Railway Company
NERFINISHED
ⓘ
Railway lines in Chiba Prefecture ⓘ |
| hasConnection |
Jōban Line (via through services)
NERFINISHED
ⓘ
Narita Airport Line NERFINISHED ⓘ Narita Express services ⓘ Sōbu Main Line NERFINISHED ⓘ |
| hasDepot | Narita depot NERFINISHED ⓘ |
| hasJapaneseName | 成田線 NERFINISHED ⓘ |
| hasRollingStockType | JR East suburban EMUs ⓘ |
| hasServiceType |
commuter services
ⓘ
local trains ⓘ rapid trains ⓘ |
| hasStationArea |
Abiko, Chiba
NERFINISHED
ⓘ
Chiba NERFINISHED ⓘ Narita NERFINISHED ⓘ Sakura, Chiba NERFINISHED ⓘ |
| isPartiallyParallelTo | Keisei Main Line (in Narita area) NERFINISHED ⓘ |
| languageOfName | Japanese ⓘ |
| locatedIn | Chiba Prefecture NERFINISHED ⓘ |
| opened | early 20th century ⓘ |
| operator |
East Japan Railway Company
NERFINISHED
ⓘ
JR East NERFINISHED ⓘ |
| owner |
East Japan Railway Company
NERFINISHED
ⓘ
JR East NERFINISHED ⓘ |
| partOf | JR East Chiba area network NERFINISHED ⓘ |
| primaryUse |
airport access (via connections)
ⓘ
commuter transport ⓘ |
| railwaySystem | JR East network NERFINISHED ⓘ |
| regionServed | Kantō region NERFINISHED ⓘ |
| safetySystem | ATS (Automatic Train Stop) NERFINISHED ⓘ |
| serves |
Narita
NERFINISHED
ⓘ
Narita International Airport NERFINISHED ⓘ |
| servesFunction | link between Chiba urban area and Narita region ⓘ |
| signallingSystem | automatic block signalling ⓘ |
| ticketingSystem | IC cards such as Suica ⓘ |
| trackConfiguration |
double track (on some sections)
ⓘ
single track (on some sections) ⓘ |
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: Narita Line Description of subject: The Narita Line is a railway line in Japan operated by JR East that connects Chiba Prefecture with Narita and its surrounding areas, serving both local commuters and access to Narita International Airport via connecting services.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Narita Line (JR East)
this entity surface form:
Narita Line (Airport Branch)