San Antonio Reservoir
E567741
San Antonio Reservoir is a major water storage facility in California that supplies drinking water to the San Francisco Bay Area as part of its regional reservoir network.
All labels observed (2)
| Label | Occurrences |
|---|---|
| San Antonio Reservoir canonical | 2 |
| San Antonio Reservoir (Monterey County) | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T5754596 — 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: San Antonio Reservoir Context triple: [San Francisco Peninsula reservoir system, hasPart, San Antonio Reservoir]
-
A.
La Paloma Reservoir
La Paloma Reservoir is a major artificial lake in Chile’s Coquimbo Region, known for supporting irrigation and water supply in the Monte Patria area.
-
B.
Martinez Reservoir
Martinez Reservoir is a man-made water storage facility in Contra Costa County, California, used for municipal and irrigation supply as part of the region’s canal and water management system.
-
C.
La Mesa Reservoir
La Mesa Reservoir is a major water storage facility in the Philippines that supplies potable water to Metro Manila and is located within the protected La Mesa Watershed.
-
D.
San Luis Reservoir
San Luis Reservoir is a large artificial lake in California that serves as a major water storage facility for irrigation and municipal use in the state’s Central Valley.
-
E.
Don Pedro Reservoir
Don Pedro Reservoir is a large artificial lake in California’s Sierra Nevada foothills, primarily used for water storage, hydroelectric power generation, and recreation.
- 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: San Antonio Reservoir Target entity description: San Antonio Reservoir is a major water storage facility in California that supplies drinking water to the San Francisco Bay Area as part of its regional reservoir network.
-
A.
La Paloma Reservoir
La Paloma Reservoir is a major artificial lake in Chile’s Coquimbo Region, known for supporting irrigation and water supply in the Monte Patria area.
-
B.
Martinez Reservoir
Martinez Reservoir is a man-made water storage facility in Contra Costa County, California, used for municipal and irrigation supply as part of the region’s canal and water management system.
-
C.
La Mesa Reservoir
La Mesa Reservoir is a major water storage facility in the Philippines that supplies potable water to Metro Manila and is located within the protected La Mesa Watershed.
-
D.
San Luis Reservoir
San Luis Reservoir is a large artificial lake in California that serves as a major water storage facility for irrigation and municipal use in the state’s Central Valley.
-
E.
Don Pedro Reservoir
Don Pedro Reservoir is a large artificial lake in California’s Sierra Nevada foothills, primarily used for water storage, hydroelectric power generation, and recreation.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
reservoir
ⓘ
water storage facility ⓘ |
| access | not open for general public recreation ⓘ |
| basinCountry |
United States
ⓘ
linked to:
United States of America
|
| completedIn | 1960s ⓘ |
| connectedTo |
Calaveras Reservoir
ⓘ
Hetch Hetchy Aqueduct ⓘ |
| constructionStart | 1960s ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| damType | earth-fill dam ⓘ |
| hasRestriction | public access restricted to protect drinking water quality ⓘ |
| impoundedBy | San Antonio Dam ⓘ |
| inflow | San Antonio Creek ⓘ |
| locatedIn |
Alameda County, California
ⓘ
linked to:
Alameda County
Alameda Creek watershed ⓘ
linked to:
Alameda Creek
California ⓘ
linked to:
California, United States
|
| locatedInRegion | San Francisco Bay Area ⓘ |
| locatedNear |
Pleasanton, California
ⓘ
Sunol, California ⓘ |
| locatedOn | San Antonio Valley ⓘ |
| managedBy | San Francisco Public Utilities Commission ⓘ |
| nearCity |
Fremont, California
ⓘ
linked to:
Fremont
Livermore, California ⓘ
linked to:
Livermore
|
| nearProtectedArea |
Ohlone Regional Wilderness
ⓘ
linked to:
Sunol Regional Wilderness
Sunol Regional Wilderness ⓘ |
| operator | San Francisco Public Utilities Commission ⓘ |
| outflow | San Antonio Creek ⓘ |
| ownedBy |
City and County of San Francisco
ⓘ
linked to:
San Francisco County
|
| partOf |
Bay Area water supply system
ⓘ
Hetch Hetchy Regional Water System ⓘ San Francisco regional reservoir network ⓘ |
| primaryFunction |
regulation of regional water deliveries
ⓘ
storage of imported Sierra Nevada water ⓘ |
| regionServed |
San Francisco Peninsula
ⓘ
South Bay communities ⓘ |
| suppliesWaterTo |
Peninsula communities in the Bay Area
ⓘ
San Francisco Bay Area ⓘ San Francisco, California ⓘ
linked to:
San Francisco
|
| use |
drinking water supply
ⓘ
municipal water supply ⓘ |
| watercourse | San Antonio Creek ⓘ |
| waterQualityUse | treated for potable use ⓘ |
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: San Antonio Reservoir Description of subject: San Antonio Reservoir is a major water storage facility in California that supplies drinking water to the San Francisco Bay Area as part of its regional reservoir network.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.