San Mateo County Board of Supervisors
E63209
The San Mateo County Board of Supervisors is the elected governing body responsible for setting policy, passing ordinances, and overseeing the administration and budget of San Mateo County, California.
All labels observed (2)
| Label | Occurrences |
|---|---|
| San Mateo County Board of Supervisors canonical | 2 |
| Government of San Mateo County | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T507190 — 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 Board of Supervisors Context triple: [San Mateo County, California, hasBoard, San Mateo County Board of Supervisors]
-
A.
San Francisco Board of Supervisors
The San Francisco Board of Supervisors is the city and county’s elected legislative body, responsible for passing local laws, approving budgets, and overseeing municipal agencies.
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B.
San Mateo County, California
San Mateo County, California is a coastal county in the San Francisco Bay Area known for its affluent communities, tech industry presence, and proximity to both San Francisco and Silicon Valley.
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C.
Sacramento City Council
The Sacramento City Council is the elected governing body responsible for setting policy, passing local laws, and overseeing the municipal government of Sacramento, California.
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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.
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E.
Marin County
Marin County is a coastal county in the San Francisco Bay Area known for its affluent communities, scenic landscapes, and landmarks like the Marin Headlands and Mount Tamalpais.
- 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 Board of Supervisors Target entity description: The San Mateo County Board of Supervisors is the elected governing body responsible for setting policy, passing ordinances, and overseeing the administration and budget of San Mateo County, California.
-
A.
San Francisco Board of Supervisors
The San Francisco Board of Supervisors is the city and county’s elected legislative body, responsible for passing local laws, approving budgets, and overseeing municipal agencies.
-
B.
San Mateo County, California
San Mateo County, California is a coastal county in the San Francisco Bay Area known for its affluent communities, tech industry presence, and proximity to both San Francisco and Silicon Valley.
-
C.
Sacramento City Council
The Sacramento City Council is the elected governing body responsible for setting policy, passing local laws, and overseeing the municipal government of Sacramento, California.
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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.
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E.
Marin County
Marin County is a coastal county in the San Francisco Bay Area known for its affluent communities, scenic landscapes, and landmarks like the Marin Headlands and Mount Tamalpais.
- F. None of above. chosen
Statements (40)
| Predicate | Object |
|---|---|
| instanceOf |
county board of supervisors
ⓘ
local governing body ⓘ |
| appliesToJurisdiction | unincorporated areas of San Mateo County ⓘ |
| budgetaryAuthority | San Mateo County annual budget ⓘ |
| canPass |
ordinances
ⓘ
resolutions ⓘ |
| country | United States of America ⓘ |
| electionMethod | elected by district ⓘ |
| governmentBranch |
executive branch of San Mateo County government
ⓘ
legislative branch of San Mateo County government ⓘ |
| governmentType | county government ⓘ |
| governs | San Mateo County, California ⓘ |
| hasLeader |
Board of Supervisors
ⓘ
surface form:
President of the Board of Supervisors
|
| jurisdiction | San Mateo County, California ⓘ |
| legalBasis | California state law ⓘ |
| locatedInTheAdministrativeTerritorialEntity | Redwood City, California ⓘ |
| meetingPlace | Hall of Justice and Records, Redwood City, California ⓘ |
| meets | regularly scheduled public meetings ⓘ |
| memberTitle | County Supervisor ⓘ |
| numberOfMembers | 5 ⓘ |
| oversees | San Mateo County departments and agencies ⓘ |
| parentOrganization |
San Mateo County Board of Supervisors
self-linksurface differs
ⓘ
surface form:
Government of San Mateo County
|
| partOf | local government of San Mateo County ⓘ |
| power |
adopt county budget
ⓘ
appoint county officials ⓘ enact ordinances ⓘ set countywide policies ⓘ |
| represents | residents of San Mateo County ⓘ |
| responsibility |
overseeing county administration
ⓘ
overseeing county budget ⓘ passing county ordinances ⓘ setting county policy ⓘ |
| role |
executive body of San Mateo County
ⓘ
legislative body of San Mateo County ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| subjectTo | Brown Act open meeting laws of California ⓘ |
| supervises | County Manager of San Mateo County ⓘ |
| termLength | 4 years ⓘ |
| typeOfJurisdictionRepresentation | district-based representation ⓘ |
| website | https://www.smcgov.org/board-supervisors ⓘ |
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 Board of Supervisors Description of subject: The San Mateo County Board of Supervisors is the elected governing body responsible for setting policy, passing ordinances, and overseeing the administration and budget of San Mateo County, California.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
San Mateo County Board of Supervisors
→
parentOrganization
→
San Mateo County Board of Supervisors
self-linksurface differs
ⓘ
this entity surface form:
Government of San Mateo County