Alameda-Contra Costa Transit District
E359707
The Alameda-Contra Costa Transit District is a public transit agency serving the East Bay region of the San Francisco Bay Area, primarily providing bus services across Alameda and Contra Costa counties.
All labels observed (4)
| Label | Occurrences |
|---|---|
| AC Transit | 10 |
| Alameda-Contra Costa Transit District canonical | 4 |
| AC Transit bus service | 1 |
| AC Transit facilities | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T3347109 — 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: Alameda-Contra Costa Transit District Context triple: [Capitol Corridor Joint Powers Authority, memberAgency, Alameda-Contra Costa Transit District]
-
A.
Solano Transportation Authority
Solano Transportation Authority is a public agency that plans, funds, and coordinates transportation projects and services within Solano County, California.
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B.
Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
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C.
San Francisco Bay Area Rapid Transit District
The San Francisco Bay Area Rapid Transit District is the public agency that plans, funds, and oversees the Bay Area’s regional BART rail transit system.
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D.
San Mateo County Transit District
San Mateo County Transit District is the public agency that oversees and manages bus and other transit services in San Mateo County, California.
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E.
Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus 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: Alameda-Contra Costa Transit District Target entity description: The Alameda-Contra Costa Transit District is a public transit agency serving the East Bay region of the San Francisco Bay Area, primarily providing bus services across Alameda and Contra Costa counties.
-
A.
Solano Transportation Authority
Solano Transportation Authority is a public agency that plans, funds, and coordinates transportation projects and services within Solano County, California.
-
B.
Santa Clara Valley Transportation Authority
The Santa Clara Valley Transportation Authority is the public transit agency that operates bus, light rail, and related transportation services throughout Santa Clara County in California’s Silicon Valley.
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C.
San Francisco Bay Area Rapid Transit District
The San Francisco Bay Area Rapid Transit District is the public agency that plans, funds, and oversees the Bay Area’s regional BART rail transit system.
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D.
San Mateo County Transit District
San Mateo County Transit District is the public agency that oversees and manages bus and other transit services in San Mateo County, California.
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E.
Sacramento Regional Transit
Sacramento Regional Transit is the public transportation agency serving the Sacramento, California metropolitan area with light rail and bus services.
- F. None of above. chosen
Statements (49)
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: Alameda-Contra Costa Transit District Description of subject: The Alameda-Contra Costa Transit District is a public transit agency serving the East Bay region of the San Francisco Bay Area, primarily providing bus services across Alameda and Contra Costa counties.
Referenced by (16)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
AC Transit
San Francisco Bay Area Rapid Transit District
→
collaboratesWith
→
Alameda-Contra Costa Transit District
ⓘ
this entity surface form:
AC Transit
this entity surface form:
AC Transit
this entity surface form:
AC Transit bus service
subject surface form:
Ashland, California
this entity surface form:
AC Transit
this entity surface form:
AC Transit
this entity surface form:
AC Transit
this entity surface form:
AC Transit
this entity surface form:
AC Transit facilities
this entity surface form:
AC Transit
this entity surface form:
AC Transit
this entity surface form:
AC Transit