Union Pacific Railroad Fresno Subdivision
E434062
The Union Pacific Railroad Fresno Subdivision is a key freight and passenger rail corridor in California’s Central Valley that carries both Union Pacific trains and Altamont Corridor Express commuter services.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Union Pacific Railroad Fresno Subdivision canonical | 2 |
| Union Pacific Railroad network in California | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T4235522 — 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 Fresno Subdivision Context triple: [Altamont Corridor Express, usesRailLine, Union Pacific Railroad Fresno Subdivision]
-
A.
Union Pacific Railroad Coast Subdivision
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.
-
B.
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.
-
C.
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.
-
D.
Union Pacific Railroad Tracy Subdivision
The Union Pacific Railroad Tracy Subdivision is a freight and passenger rail line in California’s Central Valley and Altamont Pass area that serves as a key route for both Union Pacific operations and commuter services like the Altamont Corridor Express.
-
E.
California Western Railroad
California Western Railroad is a historic short-line railway in Northern California, best known for its scenic "Skunk Train" excursions through the redwood forests between Willits and Fort Bragg.
- 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 Fresno Subdivision Target entity description: The Union Pacific Railroad Fresno Subdivision is a key freight and passenger rail corridor in California’s Central Valley that carries both Union Pacific trains and Altamont Corridor Express commuter services.
-
A.
Union Pacific Railroad Coast Subdivision
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.
-
B.
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.
-
C.
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.
-
D.
Union Pacific Railroad Tracy Subdivision
The Union Pacific Railroad Tracy Subdivision is a freight and passenger rail line in California’s Central Valley and Altamont Pass area that serves as a key route for both Union Pacific operations and commuter services like the Altamont Corridor Express.
-
E.
California Western Railroad
California Western Railroad is a historic short-line railway in Northern California, best known for its scenic "Skunk Train" excursions through the redwood forests between Willits and Fort Bragg.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
railroad subdivision
ⓘ
railway line ⓘ |
| alsoCarries | commuter rail services ⓘ |
| commuterOperatorOnLine | Altamont Corridor Express ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| electrification | non‑electrified ⓘ |
| hasService |
Altamont Corridor Express commuter rail
ⓘ
linked to:
Altamont Corridor Express
|
| locatedIn |
California
ⓘ
linked to:
California, United States
Central Valley ⓘ |
| locatedOnContinent | North America ⓘ |
| operator | Union Pacific Railroad ⓘ |
| owner | Union Pacific Railroad ⓘ |
| partOfNetwork |
Union Pacific Railroad network
ⓘ
linked to:
Union Pacific Railroad
|
| primaryTrafficType | freight ⓘ |
| railGauge | standard gauge ⓘ |
| railwayType | main line ⓘ |
| regionServed | San Joaquin Valley ⓘ |
| significance |
key freight corridor in California’s Central Valley
ⓘ
key passenger rail corridor in California’s Central Valley ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| trackUsage | shared freight and passenger operations ⓘ |
| usedBy |
Altamont Corridor Express
ⓘ
Union Pacific Railroad ⓘ |
| usedFor |
freight rail transport
ⓘ
passenger 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 Fresno Subdivision Description of subject: The Union Pacific Railroad Fresno Subdivision is a key freight and passenger rail corridor in California’s Central Valley that carries both Union Pacific trains and Altamont Corridor Express commuter services.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
Union Pacific Railroad Oakland Subdivision
→
partOf
→
Union Pacific Railroad network in California
ⓘ
linked to: Union Pacific Railroad Fresno Subdivision
San Joaquin Valley transportation corridor
→
includesRailLine
→
Union Pacific Railroad Fresno Subdivision
ⓘ
Union Pacific Railroad Martinez Subdivision
→
partOf
→
Union Pacific Railroad network in California
ⓘ
linked to: Union Pacific Railroad Fresno Subdivision