Alameda County Sheriff’s Office
E474595
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.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Alameda County Sheriff's Office | 1 |
| Alameda County Sheriff’s Office canonical | 1 |
| Alameda County Sheriff’s Office (contract) | 1 |
| Alameda County law enforcement agencies | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4864768 — 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 County Sheriff’s Office Context triple: [District Attorney of Alameda County, worksWith, Alameda County Sheriff’s Office]
-
A.
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.
-
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.
Los Angeles County Sheriff's Department
The Los Angeles County Sheriff's Department is the primary law enforcement agency serving Los Angeles County, California, responsible for policing unincorporated areas, operating county jails, and providing contract services to numerous cities.
-
E.
Alameda County Board of Supervisors
The Alameda County Board of Supervisors is the elected governing body responsible for setting policy, passing local laws, and overseeing county services and budgets in Alameda County, California.
- 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 County Sheriff’s Office Target entity description: 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.
-
A.
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.
-
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.
Los Angeles County Sheriff's Department
The Los Angeles County Sheriff's Department is the primary law enforcement agency serving Los Angeles County, California, responsible for policing unincorporated areas, operating county jails, and providing contract services to numerous cities.
-
E.
Alameda County Board of Supervisors
The Alameda County Board of Supervisors is the elected governing body responsible for setting policy, passing local laws, and overseeing county services and budgets in Alameda County, California.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
county sheriff's office
ⓘ
law enforcement agency ⓘ |
| cooperatesWith |
California Highway Patrol
NERFINISHED
ⓘ
Federal Bureau of Investigation NERFINISHED ⓘ local police departments in Alameda County ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Alameda County NERFINISHED ⓘ |
| electedOfficial | Alameda County Sheriff NERFINISHED ⓘ |
| employs |
civilian staff
ⓘ
correctional officers ⓘ sworn deputies ⓘ |
| fundedBy | Alameda County budget ⓘ |
| governingBody | Alameda County Board of Supervisors NERFINISHED ⓘ |
| hasDivision |
administrative services division
ⓘ
custody and corrections division NERFINISHED ⓘ investigations division ⓘ patrol division ⓘ |
| hasUnit |
K-9 unit
NERFINISHED
ⓘ
SWAT team NERFINISHED ⓘ air support unit ⓘ bomb squad ⓘ marine patrol unit ⓘ |
| headquartersLocation | Oakland, California NERFINISHED ⓘ |
| jurisdiction | Alameda County, California NERFINISHED ⓘ |
| lawEnforcementType | full-service law enforcement agency ⓘ |
| ledBy | Alameda County Sheriff NERFINISHED ⓘ |
| legalAuthority | California state law ⓘ |
| operates | county jail system of Alameda County ⓘ |
| oversees |
Glenn E. Dyer Detention Facility
NERFINISHED
ⓘ
Santa Rita Jail NERFINISHED ⓘ |
| partOf | Alameda County government NERFINISHED ⓘ |
| provides |
community outreach programs
ⓘ
crime prevention programs ⓘ inmate transportation services ⓘ training for law enforcement personnel ⓘ |
| providesServiceTo |
incorporated cities by contract in Alameda County
ⓘ
unincorporated communities in Alameda County ⓘ |
| responsibleFor |
civil process service in Alameda County
ⓘ
coroner services in Alameda County ⓘ corrections operations in Alameda County ⓘ court security services in Alameda County ⓘ emergency services coordination in Alameda County ⓘ operating county jails in Alameda County ⓘ policing unincorporated areas of Alameda County ⓘ providing public safety services in Alameda County ⓘ search and rescue operations in Alameda County ⓘ |
| sector | public safety ⓘ |
| 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: Alameda County Sheriff’s Office Description of subject: 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.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Alameda County Sheriff's Office
this entity surface form:
Alameda County Sheriff’s Office (contract)
this entity surface form:
Alameda County law enforcement agencies