Contra Costa County Sheriff’s Office
E476762
The Contra Costa County Sheriff’s Office is the primary law enforcement agency responsible for policing unincorporated areas and providing countywide public safety services in Contra Costa County, California.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Contra Costa County Sheriff’s Office canonical | 3 |
| Contra Costa County Sheriff's Office | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4874247 — 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: Contra Costa County Sheriff’s Office Context triple: [Vine Hill, California, servedBy, Contra Costa County Sheriff’s Office]
-
A.
Alameda County Sheriff’s Office
The Alameda County Sheriff’s Office is the primary law enforcement agency responsible for policing unincorporated areas, operating county jails, and providing public safety services throughout Alameda County, California.
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B.
Sacramento County Sheriff’s Office
The Sacramento County Sheriff’s Office is the primary law enforcement agency responsible for policing unincorporated areas and providing countywide public safety services in Sacramento County, California.
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C.
Calaveras County Sheriff’s Office
The Calaveras County Sheriff’s Office is the primary law enforcement agency responsible for public safety, patrol, investigations, and jail operations within Calaveras County, California.
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D.
Contra Costa County Board of Supervisors
The Contra Costa County Board of Supervisors is the elected governing body responsible for setting policy, passing ordinances, and overseeing county services and administration in Contra Costa County, California.
-
E.
San Francisco Sheriff’s Office
The San Francisco Sheriff’s Office is the county law enforcement agency responsible for operating jails, providing court security, and performing civil and custody-related duties within the City and County of San Francisco.
- 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: Contra Costa County Sheriff’s Office Target entity description: The Contra Costa County Sheriff’s Office is the primary law enforcement agency responsible for policing unincorporated areas and providing countywide public safety services in Contra Costa County, California.
-
A.
Alameda County Sheriff’s Office
The Alameda County Sheriff’s Office is the primary law enforcement agency responsible for policing unincorporated areas, operating county jails, and providing public safety services throughout Alameda County, California.
-
B.
Sacramento County Sheriff’s Office
The Sacramento County Sheriff’s Office is the primary law enforcement agency responsible for policing unincorporated areas and providing countywide public safety services in Sacramento County, California.
-
C.
Calaveras County Sheriff’s Office
The Calaveras County Sheriff’s Office is the primary law enforcement agency responsible for public safety, patrol, investigations, and jail operations within Calaveras County, California.
-
D.
Contra Costa County Board of Supervisors
The Contra Costa County Board of Supervisors is the elected governing body responsible for setting policy, passing ordinances, and overseeing county services and administration in Contra Costa County, California.
-
E.
San Francisco Sheriff’s Office
The San Francisco Sheriff’s Office is the county law enforcement agency responsible for operating jails, providing court security, and performing civil and custody-related duties within the City and County of San Francisco.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
county sheriff's office
ⓘ
law enforcement agency ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| employs |
civilian staff
ⓘ
correctional officers ⓘ sworn deputies ⓘ |
| follows |
Contra Costa County ordinances
ⓘ
United States Constitution NERFINISHED ⓘ laws of the State of California ⓘ |
| governedBy | Contra Costa County government NERFINISHED ⓘ |
| hasDuty |
crime prevention
ⓘ
criminal investigations ⓘ custody of inmates in county jails ⓘ emergency management support in Contra Costa County ⓘ law enforcement ⓘ public safety ⓘ security of county courts ⓘ service of civil and criminal process ⓘ transport of prisoners ⓘ |
| hasType | local law enforcement agency ⓘ |
| headedBy | Contra Costa County Sheriff-Coroner NERFINISHED ⓘ |
| jurisdiction | Contra Costa County, California NERFINISHED ⓘ |
| language | English ⓘ |
| locatedIn | Contra Costa County, California NERFINISHED ⓘ |
| operatesInTimeZone | Pacific Time Zone NERFINISHED ⓘ |
| partOf |
criminal justice system of Contra Costa County
ⓘ
law enforcement system of California ⓘ |
| providesServiceTo | residents of Contra Costa County ⓘ |
| responsibleFor |
civil process services in Contra Costa County
ⓘ
coroner services in Contra Costa County ⓘ countywide public safety services in Contra Costa County ⓘ court security services in Contra Costa County ⓘ emergency response in Contra Costa County ⓘ investigative services in Contra Costa County ⓘ marine patrol on county waterways ⓘ operating county jail facilities ⓘ patrol services in unincorporated communities ⓘ policing unincorporated areas of Contra Costa County ⓘ search and rescue operations in Contra Costa County ⓘ |
| serviceArea |
contract cities within Contra Costa County
ⓘ
unincorporated communities of Contra Costa County ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
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: Contra Costa County Sheriff’s Office Description of subject: The Contra Costa County Sheriff’s Office is the primary law enforcement agency responsible for policing unincorporated areas and providing countywide public safety services in Contra Costa County, California.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Contra Costa County Sheriff's Office