San Luis Obispo Subdivision
E905530
The San Luis Obispo Subdivision is a railroad line segment in California that forms part of the Union Pacific (formerly Southern Pacific) Coast Line, serving the San Luis Obispo area and surrounding region.
All labels observed (1)
| Label | Occurrences |
|---|---|
| San Luis Obispo Subdivision canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11105319 — 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: San Luis Obispo Subdivision Context triple: [Coast Line, passesThrough, San Luis Obispo Subdivision]
-
A.
San Diego Subdivision
The San Diego Subdivision is a key Southern California railway line used for passenger and freight service, including commuter operations in the San Diego region.
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B.
BNSF San Bernardino Subdivision
The BNSF San Bernardino Subdivision is a major freight rail line in Southern California operated by BNSF Railway, serving as a key corridor for transcontinental rail traffic.
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C.
Santa Cruz railway branch
The Santa Cruz railway branch is a commuter rail line in Rio de Janeiro that connects the western neighborhoods, including Santa Cruz, to the city’s central rail network.
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D.
Union Pacific Valley Subdivision
The Union Pacific Valley Subdivision is a railroad line operated by Union Pacific that serves as a key freight corridor within its regional rail network.
-
E.
Union Pacific Railroad Fresno Subdivision
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.
- 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: San Luis Obispo Subdivision Target entity description: The San Luis Obispo Subdivision is a railroad line segment in California that forms part of the Union Pacific (formerly Southern Pacific) Coast Line, serving the San Luis Obispo area and surrounding region.
-
A.
San Diego Subdivision
The San Diego Subdivision is a key Southern California railway line used for passenger and freight service, including commuter operations in the San Diego region.
-
B.
BNSF San Bernardino Subdivision
The BNSF San Bernardino Subdivision is a major freight rail line in Southern California operated by BNSF Railway, serving as a key corridor for transcontinental rail traffic.
-
C.
Santa Cruz railway branch
The Santa Cruz railway branch is a commuter rail line in Rio de Janeiro that connects the western neighborhoods, including Santa Cruz, to the city’s central rail network.
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D.
Union Pacific Valley Subdivision
The Union Pacific Valley Subdivision is a railroad line operated by Union Pacific that serves as a key freight corridor within its regional rail network.
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E.
Union Pacific Railroad Fresno Subdivision
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.
- F. None of above. chosen
Statements (27)
| Predicate | Object |
|---|---|
| instanceOf |
railroad line
ⓘ
railway subdivision ⓘ |
| belongsTo | Union Pacific Coast Subdivision system NERFINISHED ⓘ |
| connectsRegion | San Luis Obispo area ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentOperator | Union Pacific Railroad NERFINISHED ⓘ |
| formerlyOwnedBy | Southern Pacific Transportation Company NERFINISHED ⓘ |
| formsPartOf | Pacific coast rail corridor NERFINISHED ⓘ |
| hasLineType | main line ⓘ |
| historicalOperator | Southern Pacific Railroad NERFINISHED ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
United States of America ⓘ
surface form:
United States
|
| ownedBy | Union Pacific Railroad NERFINISHED ⓘ |
| partOf |
Coast Line
NERFINISHED
ⓘ
Union Pacific Coast Line NERFINISHED ⓘ |
| partOfNetwork | Union Pacific Railroad network NERFINISHED ⓘ |
| passesNear | City of San Luis Obispo NERFINISHED ⓘ |
| passesThrough | San Luis Obispo County NERFINISHED ⓘ |
| railroadGauge | standard gauge ⓘ |
| railSystem | North American freight rail network NERFINISHED ⓘ |
| serves |
Central Coast region of California
NERFINISHED
ⓘ
San Luis Obispo area ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| successorTo | Southern Pacific Coast Line segment NERFINISHED ⓘ |
| trackType | heavy rail ⓘ |
| usedFor |
freight rail service
ⓘ
passenger rail service ⓘ |
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: San Luis Obispo Subdivision Description of subject: The San Luis Obispo Subdivision is a railroad line segment in California that forms part of the Union Pacific (formerly Southern Pacific) Coast Line, serving the San Luis Obispo area and surrounding region.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.