Pilarcitos Lake
E562812
Pilarcitos Lake is a man-made reservoir on the San Francisco Peninsula that stores water as part of the region’s municipal supply system.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Pilarcitos Lake canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5754593 — 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: Pilarcitos Lake Context triple: [San Francisco Peninsula reservoir system, hasPart, Pilarcitos Lake]
-
A.
Gutiérrez Lake
Gutiérrez Lake is a glacial Andean lake in Argentina’s Patagonia region, known for its clear waters, surrounding forests, and outdoor recreation opportunities near Bariloche.
-
B.
Panguipulli Lake
Panguipulli Lake is a scenic glacial lake in southern Chile, renowned for its surrounding volcanoes, native forests, and role as a major attraction in the country's Lake District.
-
C.
Los Molinos Lake
Los Molinos Lake is an artificial reservoir and popular recreational and water-sports destination located in Córdoba Province, Argentina.
-
D.
Conguillío Lake
Conguillío Lake is a scenic glacial lake in Chile’s Conguillío National Park, renowned for its clear waters, surrounding Araucaria forests, and dramatic views of the nearby Llaima Volcano.
-
E.
Lago Toro
Lago Toro is a scenic mountain lake located within Chile’s Huerquehue National Park, known for its forested surroundings and hiking access.
- 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: Pilarcitos Lake Target entity description: Pilarcitos Lake is a man-made reservoir on the San Francisco Peninsula that stores water as part of the region’s municipal supply system.
-
A.
Gutiérrez Lake
Gutiérrez Lake is a glacial Andean lake in Argentina’s Patagonia region, known for its clear waters, surrounding forests, and outdoor recreation opportunities near Bariloche.
-
B.
Panguipulli Lake
Panguipulli Lake is a scenic glacial lake in southern Chile, renowned for its surrounding volcanoes, native forests, and role as a major attraction in the country's Lake District.
-
C.
Los Molinos Lake
Los Molinos Lake is an artificial reservoir and popular recreational and water-sports destination located in Córdoba Province, Argentina.
-
D.
Conguillío Lake
Conguillío Lake is a scenic glacial lake in Chile’s Conguillío National Park, renowned for its clear waters, surrounding Araucaria forests, and dramatic views of the nearby Llaima Volcano.
-
E.
Lago Toro
Lago Toro is a scenic mountain lake located within Chile’s Huerquehue National Park, known for its forested surroundings and hiking access.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
body of water
ⓘ
reservoir ⓘ |
| basinCountry | United States of America ⓘ |
| category |
Reservoirs in California
ⓘ
Reservoirs in San Mateo County, California ⓘ San Francisco Bay Area water infrastructure ⓘ |
| country | United States of America ⓘ |
| elevation | approximately 200–300 meters above sea level ⓘ |
| formedBy | Pilarcitos Dam ⓘ |
| function |
regulation of streamflow in Pilarcitos Creek
ⓘ
storage of surface water ⓘ |
| inflow | Pilarcitos Creek ⓘ |
| locatedIn |
California
ⓘ
linked to:
California, United States
Northern California ⓘ Pilarcitos Creek watershed ⓘ San Mateo County, California ⓘ |
| locatedNear |
Half Moon Bay, California
ⓘ
Pilarcitos Creek watershed ⓘ |
| locatedOn | San Francisco Peninsula ⓘ |
| manages | raw water storage for regional distribution ⓘ |
| operator | San Francisco Public Utilities Commission ⓘ |
| outflow | Pilarcitos Creek ⓘ |
| owner |
City and County of San Francisco
ⓘ
linked to:
San Francisco County
|
| partOf |
San Francisco Peninsula water supply system
ⓘ
linked to:
San Francisco Peninsula reservoir system
San Francisco Public Utilities Commission water system ⓘ |
| region | San Francisco Bay Area ⓘ |
| use |
drinking water storage
ⓘ
municipal water supply ⓘ |
| watercourse | Pilarcitos Creek ⓘ |
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: Pilarcitos Lake Description of subject: Pilarcitos Lake is a man-made reservoir on the San Francisco Peninsula that stores water as part of the region’s municipal supply system.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.