Union Pacific Railroad Coast Subdivision
E428219
The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
All labels observed (6)
How this entity was disambiguated
This entity first appeared as the object of triple T4235520 — 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: Union Pacific Railroad Coast Subdivision Context triple: [Altamont Corridor Express, usesRailLine, Union Pacific Railroad Coast Subdivision]
-
A.
Union Pacific Railroad Niles Subdivision
The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
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B.
Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
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C.
Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
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D.
Union Pacific Railroad Oakland Subdivision
The Union Pacific Railroad Oakland Subdivision is a key freight and passenger rail corridor in Northern California that connects the East Bay with the Central Valley and is used by services such as the Altamont Corridor Express.
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E.
Union Pacific Northwest Line
The Union Pacific Northwest Line is a commuter rail route serving Chicago and its northwestern suburbs as part of the Metra rail system.
- 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: Union Pacific Railroad Coast Subdivision Target entity description: The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
-
A.
Union Pacific Railroad Niles Subdivision
The Union Pacific Railroad Niles Subdivision is a freight and passenger rail corridor in California’s East Bay and Tri-Valley region that carries both Union Pacific trains and commuter services such as the Altamont Corridor Express.
-
B.
Union Pacific West Line
The Union Pacific West Line is a commuter rail route in the Chicago metropolitan area that runs between downtown Chicago and western suburbs, providing daily passenger service as part of the Metra system.
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C.
Union Pacific North Line
The Union Pacific North Line is a Metra commuter rail line in the Chicago metropolitan area that runs north from downtown Chicago through suburbs along Lake Michigan into Kenosha, Wisconsin.
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D.
Union Pacific Railroad Oakland Subdivision
The Union Pacific Railroad Oakland Subdivision is a key freight and passenger rail corridor in Northern California that connects the East Bay with the Central Valley and is used by services such as the Altamont Corridor Express.
-
E.
Union Pacific Northwest Line
The Union Pacific Northwest Line is a commuter rail route serving Chicago and its northwestern suburbs as part of the Metra rail system.
- F. None of above. chosen
Statements (24)
| Predicate | Object |
|---|---|
| instanceOf |
rail corridor
ⓘ
railway line ⓘ |
| connectsWith | other Union Pacific subdivisions in California ⓘ |
| country | United States of America ⓘ |
| electrification | not electrified ⓘ |
| hasOwner | Union Pacific Corporation subsidiary Union Pacific Railroad NERFINISHED ⓘ |
| hasRightOfWayType | shared freight and passenger ⓘ |
| hasTrackGauge | standard gauge ⓘ |
| infrastructureType | heavy rail ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
Northern California ⓘ San Francisco Bay Area region NERFINISHED ⓘ |
| operator | Union Pacific Railroad NERFINISHED ⓘ |
| owner | Union Pacific Railroad NERFINISHED ⓘ |
| partOf | Union Pacific Railroad network NERFINISHED ⓘ |
| railSystem | North American freight rail network ⓘ |
| railTraffic |
commuter trains
ⓘ
freight trains ⓘ |
| regulatingAuthority | Federal Railroad Administration NERFINISHED ⓘ |
| serves | Altamont Corridor Express NERFINISHED ⓘ |
| usedBy |
Altamont Corridor Express commuter services
ⓘ
Union Pacific freight services NERFINISHED ⓘ |
| usedFor |
commuter rail transport
ⓘ
freight rail transport ⓘ |
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: Union Pacific Railroad Coast Subdivision Description of subject: The Union Pacific Railroad Coast Subdivision is a key rail corridor in California that carries both freight and commuter services, including trains operated by the Altamont Corridor Express.
Referenced by (8)
Full triples — surface form annotated when it differs from this entity's canonical label.
Union Pacific Valley Subdivision (segments)
→
partOfNetwork
→
Union Pacific Railroad Coast Subdivision
ⓘ
this entity surface form:
Union Pacific Railroad network in California
this entity surface form:
Union Pacific Railroad (segments)
this entity surface form:
Union Pacific Coast Line
this entity surface form:
Union Pacific Coast Subdivision
this entity surface form:
Union Pacific Coast Line
this entity surface form:
Union Pacific Railroad Coast Line
this entity surface form:
Union Pacific Coast Line