Ou Main Line
E829778
The Ōu Main Line is a major Japanese railway route in the Tōhoku region that runs roughly north–south through Honshu, connecting key cities including Aomori.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ou Main Line canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T9919743 — 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: Ou Main Line Context triple: [Aomori, servedByRailLine, Ou Main Line]
-
A.
Western Main Line
The Western Main Line is one of Sweden’s principal railway routes, connecting Stockholm with major cities to the west and south, and serving as a key corridor for both passenger and freight traffic.
-
B.
Trenton Line
Trenton Line is a commuter rail service in the Philadelphia region operated by SEPTA Regional Rail, connecting Center City Philadelphia with Trenton, New Jersey.
-
C.
Southern Main Line
The Southern Main Line is a major Swedish railway route that connects key cities in the southern part of the country and serves as an important corridor for both passenger and freight traffic.
-
D.
North Coast Line
The North Coast Line is a major railway corridor in New South Wales, Australia, running along the state’s north coast and connecting Sydney with Brisbane and numerous regional centres.
-
E.
Chatham Main Line
The Chatham Main Line is a major railway route in southeast England that connects London with Medway, east Kent, and coastal towns such as Ramsgate and Dover.
- 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: Ou Main Line Target entity description: The Ōu Main Line is a major Japanese railway route in the Tōhoku region that runs roughly north–south through Honshu, connecting key cities including Aomori.
-
A.
Western Main Line
The Western Main Line is one of Sweden’s principal railway routes, connecting Stockholm with major cities to the west and south, and serving as a key corridor for both passenger and freight traffic.
-
B.
Trenton Line
Trenton Line is a commuter rail service in the Philadelphia region operated by SEPTA Regional Rail, connecting Center City Philadelphia with Trenton, New Jersey.
-
C.
Southern Main Line
The Southern Main Line is a major Swedish railway route that connects key cities in the southern part of the country and serves as an important corridor for both passenger and freight traffic.
-
D.
North Coast Line
The North Coast Line is a major railway corridor in New South Wales, Australia, running along the state’s north coast and connecting Sydney with Brisbane and numerous regional centres.
-
E.
Chatham Main Line
The Chatham Main Line is a major railway route in southeast England that connects London with Medway, east Kent, and coastal towns such as Ramsgate and Dover.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
heavy rail
ⓘ
railway line ⓘ |
| alsoUsedFor |
freight transport
ⓘ
regional rail transport ⓘ |
| connectsCity |
Akita
NERFINISHED
ⓘ
Aomori NERFINISHED ⓘ Fukushima NERFINISHED ⓘ Hirosaki NERFINISHED ⓘ Shinjō NERFINISHED ⓘ Yamagata NERFINISHED ⓘ |
| connectsToLine |
Tōhoku Main Line at Fukushima
NERFINISHED
ⓘ
Ōu Main Line branch lines ⓘ |
| country | Japan ⓘ |
| electrification | AC 20 kV 50 Hz overhead line ⓘ |
| hasRollingStockType |
diesel multiple units
ⓘ
electric multiple units ⓘ |
| hasSection |
Akita–Aomori section
NERFINISHED
ⓘ
Fukushima–Yamagata section NERFINISHED ⓘ Shinjō–Ōmagari section NERFINISHED ⓘ Yamagata–Shinjō section NERFINISHED ⓘ Ōmagari–Akita section NERFINISHED ⓘ |
| hasService |
limited express trains
ⓘ
local trains ⓘ rapid trains ⓘ |
| historicalOperator |
Japanese Government Railways
NERFINISHED
ⓘ
Japanese National Railways NERFINISHED ⓘ |
| locatedIn | Tōhoku region NERFINISHED ⓘ |
| locatedOn | Honshu ⓘ |
| nativeName | 奥羽本線 NERFINISHED ⓘ |
| nativeNameLanguage | ja ⓘ |
| numberOfTracks |
double track (large parts)
ⓘ
single track (some sections) ⓘ |
| opened | 1894 ⓘ |
| operator | East Japan Railway Company NERFINISHED ⓘ |
| orientation | north–south ⓘ |
| owner | East Japan Railway Company NERFINISHED ⓘ |
| partOfNetwork | JR East conventional lines NERFINISHED ⓘ |
| primaryFunction | intercity rail transport ⓘ |
| servesRegion |
Akita Prefecture
NERFINISHED
ⓘ
Aomori Prefecture NERFINISHED ⓘ Fukushima Prefecture NERFINISHED ⓘ Yamagata Prefecture NERFINISHED ⓘ |
| terminus |
Aomori Station
NERFINISHED
ⓘ
Fukushima Station NERFINISHED ⓘ |
| trackGauge |
1067 mm
ⓘ
1435 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: Ou Main Line Description of subject: The Ōu Main Line is a major Japanese railway route in the Tōhoku region that runs roughly north–south through Honshu, connecting key cities including Aomori.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.