Peninsula Subdivision
E44887
Peninsula Subdivision is a rail line in California’s San Francisco Peninsula region that carries commuter and other train services through cities such as Atherton.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Peninsula Subdivision canonical | 6 |
How this entity was disambiguated
This entity first appeared as the object of triple T350265 — 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: Peninsula Subdivision Context triple: [Atherton station, railwayLine, Peninsula Subdivision]
-
A.
Red Mountain Park
Red Mountain Park is a large urban green space in Birmingham, Alabama, featuring wooded trails, historic mining sites, and outdoor recreation areas.
-
B.
Shoreline Village
Shoreline Village is a waterfront shopping, dining, and entertainment complex in Long Beach, California, known for its marina views and boardwalk atmosphere.
-
C.
Pine Hill
Pine Hill is the modestly elevated summit that serves as the highest natural point on Cape Cod in Massachusetts.
-
D.
Sullivan’s Gulch neighborhood
Sullivan’s Gulch neighborhood is a primarily residential area in inner Northeast Portland, Oregon, known for its tree-lined streets, mid-century homes, and proximity to major transit and commercial districts.
-
E.
Bethesda Terrace
Bethesda Terrace is a grand, 19th-century architectural centerpiece of New York City's Central Park, renowned for its ornate stonework, sweeping staircases, and iconic views over the Bethesda Fountain and Lake.
- 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: Peninsula Subdivision Target entity description: Peninsula Subdivision is a rail line in California’s San Francisco Peninsula region that carries commuter and other train services through cities such as Atherton.
-
A.
Red Mountain Park
Red Mountain Park is a large urban green space in Birmingham, Alabama, featuring wooded trails, historic mining sites, and outdoor recreation areas.
-
B.
Shoreline Village
Shoreline Village is a waterfront shopping, dining, and entertainment complex in Long Beach, California, known for its marina views and boardwalk atmosphere.
-
C.
Pine Hill
Pine Hill is the modestly elevated summit that serves as the highest natural point on Cape Cod in Massachusetts.
-
D.
Sullivan’s Gulch neighborhood
Sullivan’s Gulch neighborhood is a primarily residential area in inner Northeast Portland, Oregon, known for its tree-lined streets, mid-century homes, and proximity to major transit and commercial districts.
-
E.
Bethesda Terrace
Bethesda Terrace is a grand, 19th-century architectural centerpiece of New York City's Central Park, renowned for its ornate stonework, sweeping staircases, and iconic views over the Bethesda Fountain and Lake.
- F. None of above. chosen
Statements (25)
| Predicate | Object |
|---|---|
| instanceOf |
rail line
ⓘ
railway corridor ⓘ |
| connects |
San Francisco
ⓘ
surface form:
San Francisco, California
San Jose, California, United States ⓘ
surface form:
San Jose, California
|
| electrificationStatus | partially electrified ⓘ |
| hasInfrastructure | multiple stations along the San Francisco Peninsula ⓘ |
| hasRightOfWayUse |
Caltrain
ⓘ
surface form:
Caltrain commuter rail
|
| hasService |
commuter trains
ⓘ
freight trains ⓘ other passenger trains ⓘ |
| hasTrackGauge | standard gauge ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Francisco Peninsula ⓘ United States of America ⓘ
surface form:
United States
|
| ownedBy | Union Pacific Railroad ⓘ |
| partOf | Peninsula rail corridor ⓘ |
| passesThrough |
Atherton, California, United States
ⓘ
surface form:
Atherton, California
San Francisco ⓘ
surface form:
San Francisco, California
San Mateo County, California ⓘ Santa Clara County ⓘ
surface form:
Santa Clara County, California
|
| railwayType | main line ⓘ |
| traversesRegion | San Francisco Bay Area ⓘ |
| usedFor |
commuter rail service
ⓘ
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: Peninsula Subdivision Description of subject: Peninsula Subdivision is a rail line in California’s San Francisco Peninsula region that carries commuter and other train services through cities such as Atherton.
Referenced by (6)
Full triples — surface form annotated when it differs from this entity's canonical label.