Napa County–Sonoma County line
E299595
The Napa County–Sonoma County line is the boundary between Napa and Sonoma counties in Northern California, running through the Mayacamas Mountains and including the area around Mount St. Helena.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Napa County–Sonoma County line canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2804471 — 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: Napa County–Sonoma County line Context triple: [Mount St. Helena, straddles, Napa County–Sonoma County line]
-
A.
Sonoma County, California
Sonoma County, California is a Northern California region known for its extensive wine country, scenic Pacific coastline, and redwood forests north of the San Francisco Bay Area.
-
B.
Calaveras County wine region
The Calaveras County wine region is a California viticultural area in the Sierra Foothills known for its historic Gold Rush towns and boutique wineries producing a variety of handcrafted wines.
-
C.
Napa
Napa is a city in Northern California that serves as the commercial and cultural hub of the renowned Napa Valley wine region.
-
D.
Sonoma Valley
Sonoma Valley is a renowned wine-producing region in California celebrated for its vineyards, wineries, and scenic landscapes.
-
E.
Napa County
Napa County is a renowned Northern California wine-producing region known for its vineyards, wineries, and scenic landscapes northeast 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: Napa County–Sonoma County line Target entity description: The Napa County–Sonoma County line is the boundary between Napa and Sonoma counties in Northern California, running through the Mayacamas Mountains and including the area around Mount St. Helena.
-
A.
Sonoma County, California
Sonoma County, California is a Northern California region known for its extensive wine country, scenic Pacific coastline, and redwood forests north of the San Francisco Bay Area.
-
B.
Calaveras County wine region
The Calaveras County wine region is a California viticultural area in the Sierra Foothills known for its historic Gold Rush towns and boutique wineries producing a variety of handcrafted wines.
-
C.
Napa
Napa is a city in Northern California that serves as the commercial and cultural hub of the renowned Napa Valley wine region.
-
D.
Sonoma Valley
Sonoma Valley is a renowned wine-producing region in California celebrated for its vineyards, wineries, and scenic landscapes.
-
E.
Napa County
Napa County is a renowned Northern California wine-producing region known for its vineyards, wineries, and scenic landscapes northeast of San Francisco.
- F. None of above. chosen
Statements (20)
| Predicate | Object |
|---|---|
| instanceOf |
administrative boundary
ⓘ
county boundary ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| follows | Mayacamas Mountains ⓘ |
| hasNeighboringCountyOnEast | Napa County ⓘ |
| hasNeighboringCountyOnWest |
Sonoma County
ⓘ
linked to:
Sonoma County, California
|
| locatedIn |
California
ⓘ
linked to:
California, United States
Northern California ⓘ |
| locatedInMountainRange | Mayacamas Mountains ⓘ |
| near |
Mount St. Helena area
ⓘ
linked to:
Mount St. Helena
|
| partOf |
boundary of Napa County
ⓘ
boundary of Sonoma County ⓘ |
| passesNear | Mount St. Helena ⓘ |
| region | North Bay ⓘ |
| runsThrough | Mayacamas Mountains ⓘ |
| separates |
Napa County
ⓘ
Sonoma County ⓘ
linked to:
Sonoma County, California
|
| usedFor |
county jurisdiction delimitation
ⓘ
law enforcement jurisdiction delimitation ⓘ tax jurisdiction delimitation ⓘ |
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: Napa County–Sonoma County line Description of subject: The Napa County–Sonoma County line is the boundary between Napa and Sonoma counties in Northern California, running through the Mayacamas Mountains and including the area around Mount St. Helena.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.