Port Costa, California
E113716
Port Costa, California is a small historic waterfront community on the Carquinez Strait in the San Francisco Bay Area, known for its 19th-century port heritage and preserved rural character.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Port Costa, California canonical | 15 |
How this entity was disambiguated
This entity first appeared as the object of triple T797822 — 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: Port Costa, California Context triple: [Contra Costa County, hasMajorCity, Port Costa, California]
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A.
Bombay Beach, California
Bombay Beach, California is a small, offbeat community on the eastern shore of the Salton Sea known for its decaying resort-town remnants, outsider art installations, and stark desert landscape.
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B.
Oceanside
Oceanside is a coastal city in northern San Diego County known for its beaches, historic wooden pier, and laid-back Southern California surf culture.
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C.
Placentia, California
Placentia, California is a suburban city in northern Orange County known for its quiet residential neighborhoods and strong sense of community.
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D.
Bay Point, California
Bay Point, California is an unincorporated suburban community in the San Francisco Bay Area known for its residential neighborhoods and proximity to the Sacramento–San Joaquin River Delta.
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E.
Discovery Bay, California
Discovery Bay, California is a waterfront residential community in eastern Contra Costa County known for its network of man-made lagoons and access to the Sacramento–San Joaquin River Delta.
- 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: Port Costa, California Target entity description: Port Costa, California is a small historic waterfront community on the Carquinez Strait in the San Francisco Bay Area, known for its 19th-century port heritage and preserved rural character.
-
A.
Bombay Beach, California
Bombay Beach, California is a small, offbeat community on the eastern shore of the Salton Sea known for its decaying resort-town remnants, outsider art installations, and stark desert landscape.
-
B.
Oceanside
Oceanside is a coastal city in northern San Diego County known for its beaches, historic wooden pier, and laid-back Southern California surf culture.
-
C.
Placentia, California
Placentia, California is a suburban city in northern Orange County known for its quiet residential neighborhoods and strong sense of community.
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D.
Bay Point, California
Bay Point, California is an unincorporated suburban community in the San Francisco Bay Area known for its residential neighborhoods and proximity to the Sacramento–San Joaquin River Delta.
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E.
Discovery Bay, California
Discovery Bay, California is a waterfront residential community in eastern Contra Costa County known for its network of man-made lagoons and access to the Sacramento–San Joaquin River Delta.
- F. None of above. chosen
Statements (50)
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: Port Costa, California Description of subject: Port Costa, California is a small historic waterfront community on the Carquinez Strait in the San Francisco Bay Area, known for its 19th-century port heritage and preserved rural character.
Referenced by (15)
Full triples — surface form annotated when it differs from this entity's canonical label.