Placer County
E18391
Placer County is a county in Northern California that stretches from the suburbs of the Sacramento metropolitan area into the Sierra Nevada, including parts of Lake Tahoe.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Placer County, California | 92 |
| Placer County canonical | 41 |
| County of Placer | 3 |
| Placer County (former) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T22115 — 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: Placer County Context triple: [Northern California, contains, Placer County]
-
A.
Humboldt County
Humboldt County is a rural coastal county in far Northern California known for its redwood forests, rugged Pacific shoreline, and strong cannabis-growing culture.
-
B.
Tuolumne County
Tuolumne County is a rural county in the Sierra Nevada region of California known for its mountainous landscapes, outdoor recreation, and inclusion of part of Yosemite National Park.
-
C.
Sacramento County
Sacramento County is a county in Northern California that includes the state capital, Sacramento, and serves as a major political and economic hub of the region.
-
D.
Mendocino County
Mendocino County is a coastal county in Northern California known for its rugged Pacific shoreline, redwood forests, and wine-producing Anderson Valley.
-
E.
Mariposa County
Mariposa County is a rural county in central California best known as the gateway to much of Yosemite National Park and the Sierra Nevada.
- 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: Placer County Target entity description: Placer County is a county in Northern California that stretches from the suburbs of the Sacramento metropolitan area into the Sierra Nevada, including parts of Lake Tahoe.
-
A.
Humboldt County
Humboldt County is a rural coastal county in far Northern California known for its redwood forests, rugged Pacific shoreline, and strong cannabis-growing culture.
-
B.
Tuolumne County
Tuolumne County is a rural county in the Sierra Nevada region of California known for its mountainous landscapes, outdoor recreation, and inclusion of part of Yosemite National Park.
-
C.
Sacramento County
Sacramento County is a county in Northern California that includes the state capital, Sacramento, and serves as a major political and economic hub of the region.
-
D.
Mendocino County
Mendocino County is a coastal county in Northern California known for its rugged Pacific shoreline, redwood forests, and wine-producing Anderson Valley.
-
E.
Mariposa County
Mariposa County is a rural county in central California best known as the gateway to much of Yosemite National Park and the Sierra Nevada.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
county
ⓘ
county of California ⓘ |
| borders |
El Dorado County
ⓘ
Nevada County ⓘ
linked to:
Nevada County, California
Sacramento County ⓘ Sutter County ⓘ Washoe County, Nevada ⓘ
linked to:
Washoe County
Yuba County ⓘ |
| climate |
Mediterranean in lowlands
ⓘ
alpine in high Sierra Nevada areas ⓘ |
| contains |
Auburn State Recreation Area
ⓘ
Auburn, California ⓘ Colfax, California ⓘ Donner Pass vicinity (western approaches) ⓘ
linked to:
Donner Pass
Folsom Lake (northern and eastern shores) ⓘ Granite Bay, California ⓘ Kings Beach, California ⓘ
linked to:
Kings Beach
Lincoln, California ⓘ
linked to:
City of Lincoln, California
Loomis, California ⓘ
linked to:
Town of Loomis, California
North Lake Tahoe (California side) ⓘ
linked to:
Tahoe Vista
Rocklin, California ⓘ
linked to:
City of Rocklin, California
Roseville, California ⓘ Squaw Valley (Olympic Valley), California ⓘ
linked to:
Squaw Valley
Tahoe City, California ⓘ
linked to:
Tahoe City
part of Lake Tahoe ⓘ part of the Sierra Nevada ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| elevationRange | from Sacramento Valley lowlands to high Sierra Nevada mountains ⓘ |
| establishedIn | 1851 ⓘ |
| governmentType | county government ⓘ |
| hasHighway |
California State Route 49
ⓘ
California State Route 65 ⓘ Interstate 80 ⓘ U.S. Route 40 (historic) ⓘ
linked to:
Old U.S. Route 40
|
| hasIndustry |
outdoor recreation
ⓘ
retail ⓘ technology ⓘ tourism ⓘ |
| largestCity | Roseville, California ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Northern California ⓘ |
| namedFor | placer mining ⓘ |
| partOf |
Greater Sacramento region
ⓘ
linked to:
Sacramento metropolitan area
Sacramento metropolitan area ⓘ |
| region |
Sacramento Valley
ⓘ
Sierra Nevada ⓘ |
| seat | Auburn, California ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| timeZone | Pacific Time Zone ⓘ |
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: Placer County Description of subject: Placer County is a county in Northern California that stretches from the suburbs of the Sacramento metropolitan area into the Sierra Nevada, including parts of Lake Tahoe.
Referenced by (137)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
Placer County Executive Officer
→
locatedInTheAdministrativeTerritorialEntity
→
Placer County, California
ⓘ
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County
linked to: Placer County