Petrolia, California
E152569
Petrolia, California is a small, remote community in Humboldt County known as the first place in California where oil was discovered and for its rugged coastal setting near Cape Mendocino.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Petrolia, California canonical | 12 |
| Petrolia area of Humboldt County, California | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T545396 — 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: Petrolia, California Context triple: [Cape Mendocino, near, Petrolia, California]
-
A.
Nipton, California
Nipton, California is a small, historic desert town in eastern San Bernardino County near the Nevada border, known for its remote location, eco-tourism focus, and proximity to Mojave Desert landscapes.
-
B.
Porterville, California
Porterville, California is a small city in California’s San Joaquin Valley known for its agricultural economy and proximity to the Sierra Nevada foothills.
-
C.
Colfax, California
Colfax, California is a small historic Gold Rush–era town in Placer County known as a former railroad hub in the Sierra Nevada foothills.
-
D.
Farmersville, California
Farmersville, California is a small agricultural city in California's San Joaquin Valley known for its farming-based economy and rural community character.
-
E.
Rosamond, California
Rosamond, California is a small Mojave Desert community in Kern County known for its proximity to major aerospace and military testing facilities.
- 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: Petrolia, California Target entity description: Petrolia, California is a small, remote community in Humboldt County known as the first place in California where oil was discovered and for its rugged coastal setting near Cape Mendocino.
-
A.
Nipton, California
Nipton, California is a small, historic desert town in eastern San Bernardino County near the Nevada border, known for its remote location, eco-tourism focus, and proximity to Mojave Desert landscapes.
-
B.
Pittsburg, California
Pittsburg, California is an industrial and residential city in the San Francisco Bay Area known for its waterfront location on the Sacramento–San Joaquin River Delta and its long history tied to manufacturing and shipping.
-
C.
Porterville, California
Porterville, California is a small city in California’s San Joaquin Valley known for its agricultural economy and proximity to the Sierra Nevada foothills.
-
D.
Colfax, California
Colfax, California is a small historic Gold Rush–era town in Placer County known as a former railroad hub in the Sierra Nevada foothills.
-
E.
Farmersville, California
Farmersville, California is a small agricultural city in California's San Joaquin Valley known for its farming-based economy and rural community character.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
census-designated place
ⓘ
unincorporated community ⓘ |
| accessibleVia | Mattole Road ⓘ |
| areaCode | 707 ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| county |
Humboldt County, California
ⓘ
linked to:
Humboldt County
|
| discoveryOfOilYear | 1865 ⓘ |
| distanceTo |
about 30 miles southwest of Ferndale, California
ⓘ
about 45 miles southwest of Eureka, California ⓘ |
| elevationAboveSeaLevel | approximately 121 feet ⓘ |
| governedBy | Humboldt County Board of Supervisors ⓘ |
| hasClimate | cool-summer Mediterranean climate ⓘ |
| hasCommunityFacility | community center ⓘ |
| hasEducationalService | served by Mattole Unified School District ⓘ |
| hasNaturalHazardRisk |
coastal erosion
ⓘ
earthquakes ⓘ winter storms ⓘ |
| hasNearbyFeature |
remote beaches
ⓘ
seismically active region near Mendocino Triple Junction ⓘ steep coastal mountains ⓘ |
| hasNearbyProtectedArea | King Range Wilderness ⓘ |
| hasNearbyTrail | Lost Coast Trail ⓘ |
| hasPrimaryEconomicActivity |
ranching
ⓘ
small-scale agriculture ⓘ tourism ⓘ |
| hasReligiousBuilding | church ⓘ |
| hasVolunteerService | volunteer fire department ⓘ |
| knownFor |
first place in California where oil was discovered
ⓘ
rugged coastal setting ⓘ |
| locatedIn |
Lost Coast
ⓘ
linked to:
Lost Coast region
|
| locatedInTimeZone | Pacific Time Zone ⓘ |
| locatedNear |
Cape Mendocino
ⓘ
King Range National Conservation Area ⓘ Pacific Ocean ⓘ |
| locatedOnRiver | Mattole River ⓘ |
| namedAfter | petroleum ⓘ |
| partOf |
North Coast of California
ⓘ
census-designated places in Humboldt County, California ⓘ unincorporated communities in Humboldt County, California ⓘ |
| populationCharacteristic |
low population density
ⓘ
small population ⓘ |
| postalCode | 95558 ⓘ |
| region | Northern California ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| timeZoneDST |
Pacific Daylight Time
ⓘ
linked to:
Pacific Time Zone
|
| transportCharacteristic |
limited public transportation
ⓘ
no major highways ⓘ |
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: Petrolia, California Description of subject: Petrolia, California is a small, remote community in Humboldt County known as the first place in California where oil was discovered and for its rugged coastal setting near Cape Mendocino.
Referenced by (13)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
served by Mattole Unified School District
subject linked to:
served by Mattole Unified School District
linked to: Petrolia, California