San Francisco Bay Area Rapid Transit District
E87163
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.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Bay Area Rapid Transit District | 32 |
| San Francisco Bay Area Rapid Transit District canonical | 8 |
| Bay Area Rapid Transit system | 6 |
| BART District | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T664070 — 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 Francisco Bay Area Rapid Transit District Context triple: [BART, operator, San Francisco Bay Area Rapid Transit District]
-
A.
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.
-
B.
San Francisco County Transportation Authority
The San Francisco County Transportation Authority is the county’s transportation planning and funding agency, responsible for developing and overseeing major transit, roadway, and mobility projects in San Francisco.
-
C.
San Francisco Muni
San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
-
D.
AC Transit
AC Transit is a public bus agency serving the East Bay region of the San Francisco Bay Area, providing local and transbay bus services.
-
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: San Francisco Bay Area Rapid Transit District Target entity description: 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.
-
A.
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.
-
B.
San Francisco County Transportation Authority
The San Francisco County Transportation Authority is the county’s transportation planning and funding agency, responsible for developing and overseeing major transit, roadway, and mobility projects in San Francisco.
-
C.
San Francisco Muni
San Francisco Muni is the primary public transportation system in San Francisco, operating the city’s network of buses, light rail, historic streetcars, and cable cars.
-
D.
AC Transit
AC Transit is a public bus agency serving the East Bay region of the San Francisco Bay Area, providing local and transbay bus services.
-
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 (46)
| Predicate | Object |
|---|---|
| instanceOf |
government agency of California
ⓘ
public agency ⓘ public transit agency ⓘ special-purpose district ⓘ |
| boardMembersElectedBy | voters in the BART District ⓘ |
| boardMemberTermLength | 4 years ⓘ |
| collaboratesWith |
Alameda-Contra Costa Transit District
ⓘ
surface form:
AC Transit
Caltrain ⓘ Metropolitan Transportation Commission ⓘ San Francisco Municipal Transportation Agency ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| employs | BART employees ⓘ |
| fundingSource |
bond measures
ⓘ
fares ⓘ federal funds ⓘ local taxes ⓘ state funds ⓘ |
| governs |
BART
ⓘ
surface form:
Bay Area Rapid Transit system
|
| hasBoard |
BART
ⓘ
surface form:
BART Board of Directors
|
| hasNumberOfBoardMembers | 9 ⓘ |
| headquartersLocation |
Oakland
ⓘ
surface form:
Oakland, California
|
| industry |
public transportation
ⓘ
rail transport ⓘ |
| jurisdictionIncludes |
BART rail infrastructure
ⓘ
BART stations ⓘ |
| languageOfWorkOrName | English ⓘ |
| legalForm | special district ⓘ |
| locatedIn |
California, United States
ⓘ
surface form:
California
San Francisco Bay Area ⓘ |
| operatesOn | Pacific Time Zone ⓘ |
| oversees |
BART
ⓘ
surface form:
BART rail transit system
BART ⓘ
surface form:
Bay Area Rapid Transit
|
| purpose |
funding regional rail transit
ⓘ
maintaining regional rail transit ⓘ operating regional rail transit ⓘ planning regional rail transit ⓘ |
| regulates | BART safety policies ⓘ |
| responsibleFor |
BART system expansion planning
ⓘ
BART system maintenance oversight ⓘ capital projects for BART ⓘ |
| serviceArea |
Alameda County
ⓘ
Contra Costa County ⓘ San Francisco County ⓘ San Mateo County, California ⓘ
surface form:
San Mateo County
Santa Clara County ⓘ |
| shortName |
San Francisco Bay Area Rapid Transit District
self-linksurface differs
ⓘ
surface form:
BART District
|
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 Francisco Bay Area Rapid Transit District Description of subject: 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.
Referenced by (48)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
Capitol Corridor Joint Powers Authority
→
memberAgency
→
San Francisco Bay Area Rapid Transit District
ⓘ
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
San Francisco International Airport station
→
ownedBy
→
San Francisco Bay Area Rapid Transit District
ⓘ
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
San Francisco Bay Area Rapid Transit District
→
shortName
→
San Francisco Bay Area Rapid Transit District
self-linksurface differs
ⓘ
this entity surface form:
BART District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
subject surface form:
Warm Springs/South Fremont station
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
Embarcadero Station (BART/Muni Metro nearby terminus area)
→
isOperatedBy
→
San Francisco Bay Area Rapid Transit District
ⓘ
this entity surface form:
Bay Area Rapid Transit District
subject surface form:
Embarcadero station
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit system
subject surface form:
Dublin/Pleasanton station
this entity surface form:
Bay Area Rapid Transit District
subject surface form:
Dublin/Pleasanton station
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
subject surface form:
Powell Street station
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit system
this entity surface form:
Bay Area Rapid Transit system
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit system
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit system
this entity surface form:
Bay Area Rapid Transit system
this entity surface form:
BART District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District
this entity surface form:
Bay Area Rapid Transit District