Castro Valley station
E407277
Castro Valley station is a Bay Area Rapid Transit (BART) station in Castro Valley, California, serving as a regional commuter rail stop in the East Bay.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Castro Valley station canonical | 5 |
How this entity was disambiguated
This entity first appeared as the object of triple T3835809 — 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: Castro Valley station Context triple: [Berryessa/North San José–Richmond line, connectsStation, Castro Valley station]
-
A.
San Leandro station
San Leandro station is a Bay Area Rapid Transit (BART) station in San Leandro, California, serving as a key stop on lines connecting the East Bay with the broader San Francisco Bay Area rail network.
-
B.
Milpitas station
Milpitas station is a Bay Area Rapid Transit (BART) station in Milpitas, California, serving as a key transit hub in Silicon Valley with connections to regional rail and bus services.
-
C.
Alum Rock station
Alum Rock station is a public transit stop in San Jose, California, serving as a terminus on the Santa Clara Valley Transportation Authority (VTA) light rail system.
-
D.
Sunnyvale Station
Sunnyvale Station is a commuter rail station in Sunnyvale, California, serving Caltrain passengers along the San Francisco Peninsula.
-
E.
San Mateo station
San Mateo station is a Caltrain commuter rail stop in San Mateo, California, serving as a key transit point for Peninsula rail passengers between San Francisco and San Jose.
- 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: Castro Valley station Target entity description: Castro Valley station is a Bay Area Rapid Transit (BART) station in Castro Valley, California, serving as a regional commuter rail stop in the East Bay.
-
A.
San Leandro station
San Leandro station is a Bay Area Rapid Transit (BART) station in San Leandro, California, serving as a key stop on lines connecting the East Bay with the broader San Francisco Bay Area rail network.
-
B.
Milpitas station
Milpitas station is a Bay Area Rapid Transit (BART) station in Milpitas, California, serving as a key transit hub in Silicon Valley with connections to regional rail and bus services.
-
C.
Alum Rock station
Alum Rock station is a public transit stop in San Jose, California, serving as a terminus on the Santa Clara Valley Transportation Authority (VTA) light rail system.
-
D.
Sunnyvale Station
Sunnyvale Station is a commuter rail station in Sunnyvale, California, serving Caltrain passengers along the San Francisco Peninsula.
-
E.
San Mateo station
San Mateo station is a Caltrain commuter rail stop in San Mateo, California, serving as a key transit point for Peninsula rail passengers between San Francisco and San Jose.
- F. None of above. chosen
Statements (33)
| Predicate | Object |
|---|---|
| instanceOf |
Bay Area Rapid Transit station
ⓘ
railway station in the United States ⓘ rapid transit station ⓘ |
| accessible | yes ⓘ |
| bicycleFacilities | yes ⓘ |
| coordinates | approximately 37.692°N 122.075°W ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| county | Alameda County ⓘ |
| fareZone | BART fare system ⓘ |
| hasBusConnections | yes ⓘ |
| hasStationCode | CV ⓘ |
| line |
BART Dublin/Pleasanton line
ⓘ
linked to:
Dublin/Pleasanton–Daly City line
|
| locatedIn |
Alameda County, California
ⓘ
linked to:
Alameda County
California ⓘ
linked to:
California, United States
Castro Valley, California ⓘ United States ⓘ
linked to:
United States of America
|
| numberOfPlatforms | 1 ⓘ |
| numberOfTracks | 2 ⓘ |
| opened | 1997 ⓘ |
| owner | Bay Area Rapid Transit District ⓘ |
| parkingAvailable | yes ⓘ |
| partOf | BART system ⓘ |
| platformType | island platform ⓘ |
| region | San Francisco Bay Area ⓘ |
| servedBy |
Bay Area Rapid Transit
ⓘ
linked to:
BART
|
| serves |
Castro Valley, California
ⓘ
East Bay region ⓘ
linked to:
East Bay
|
| servesCommutersTo |
Dublin
ⓘ
Oakland ⓘ Pleasanton ⓘ
linked to:
Pleasanton, California
San Francisco ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| structureType | freeway-median station ⓘ |
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: Castro Valley station Description of subject: Castro Valley station is a Bay Area Rapid Transit (BART) station in Castro Valley, California, serving as a regional commuter rail stop in the East Bay.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.