San Mateo County Transit District
E50246
San Mateo County Transit District is the public agency that oversees and manages bus and other transit services in San Mateo County, California.
All labels observed (1)
| Label | Occurrences |
|---|---|
| San Mateo County Transit District canonical | 9 |
How this entity was disambiguated
This entity first appeared as the object of triple T369960 — 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 Mateo County Transit District Context triple: [SamTrans, parentOrganization, San Mateo County 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.
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.
-
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.
Contra Costa County
Contra Costa County is a populous county in the San Francisco Bay Area known for its suburban communities, regional parks, and role as a residential and industrial hub east of Oakland and San Francisco.
-
E.
Los Angeles County Metropolitan Transportation Authority
The Los Angeles County Metropolitan Transportation Authority is the primary public transit agency for Los Angeles County, operating and overseeing the region’s bus and rail systems.
- 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 Mateo County Transit District Target entity description: San Mateo County Transit District is the public agency that oversees and manages bus and other transit services in San Mateo County, California.
-
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.
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.
-
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.
Contra Costa County
Contra Costa County is a populous county in the San Francisco Bay Area known for its suburban communities, regional parks, and role as a residential and industrial hub east of Oakland and San Francisco.
-
E.
Los Angeles County Metropolitan Transportation Authority
The Los Angeles County Metropolitan Transportation Authority is the primary public transit agency for Los Angeles County, operating and overseeing the region’s bus and rail systems.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
public transit agency
ⓘ
public transportation provider ⓘ special district ⓘ |
| collaboratesWith |
Bay Area Rapid Transit
ⓘ
linked to:
BART
San Francisco Municipal Transportation Agency ⓘ Santa Clara Valley Transportation Authority ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| county |
San Mateo County
ⓘ
linked to:
San Mateo County, California
|
| focusesOn | mobility and access within San Mateo County ⓘ |
| fundingSource |
fares
ⓘ
federal funds ⓘ local taxes ⓘ state funds ⓘ |
| governingBodyType | board of directors ⓘ |
| governs |
SamTrans bus system
ⓘ
linked to:
SamTrans
|
| hasAbbreviation | SamTrans ⓘ |
| hasBrand | SamTrans ⓘ |
| headquartersLocation | San Carlos, California ⓘ |
| industry | public transportation ⓘ |
| jurisdiction | San Mateo County, California ⓘ |
| legalForm | public agency ⓘ |
| locatedInTimeZone | Pacific Time Zone ⓘ |
| manages |
transit operations contracts
ⓘ
transit planning in San Mateo County ⓘ |
| operates |
express bus routes to San Francisco
ⓘ
local bus routes in San Mateo County ⓘ paratransit services for people with disabilities ⓘ |
| operatingArea |
San Francisco Bay Area
ⓘ
San Mateo County, California ⓘ |
| oversees |
Caltrain
ⓘ
San Mateo County Transportation Authority ⓘ |
| owns | SamTrans bus fleet ⓘ |
| primaryMode | bus ⓘ |
| provides | public transportation information and customer service ⓘ |
| purpose | to provide public transit services in San Mateo County ⓘ |
| regionServed |
San Mateo County
ⓘ
linked to:
San Mateo County, California
|
| serviceAreaPopulation | residents of San Mateo County ⓘ |
| serviceType |
bus transit
ⓘ
commuter bus ⓘ paratransit ⓘ shuttle service ⓘ |
| shortName | SamTrans ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| website | https://www.samtrans.com/ ⓘ |
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 Mateo County Transit District Description of subject: San Mateo County Transit District is the public agency that oversees and manages bus and other transit services in San Mateo County, California.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
Board of Directors of the San Mateo County Transit District
→
partOf
→
San Mateo County Transit District
ⓘ
Board of Directors of the San Mateo County Transit District
→
governs
→
San Mateo County Transit District
ⓘ
Board of Directors of the San Mateo County Transit District
→
hasParentOrganization
→
San Mateo County Transit District
ⓘ
Board of Directors of the San Mateo County Transit District
→
namedAfter
→
San Mateo County Transit District
ⓘ
Board of Directors of the San Mateo County Transit District
→
jurisdiction
→
San Mateo County Transit District
ⓘ