Contra Loma Regional Park
E109162
Contra Loma Regional Park is a public recreation area in Contra Costa County, California, known for its reservoir, fishing, swimming lagoon, and hiking and biking trails.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Contra Loma Regional Park canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T797840 — 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: Contra Loma Regional Park Context triple: [Contra Costa County, hasRegionalPark, Contra Loma Regional Park]
-
A.
Briones Regional Park
Briones Regional Park is a large East Bay regional park in the hills of central Contra Costa County, California, known for its open grasslands, oak woodlands, and extensive hiking and equestrian trails.
-
B.
Andrew Molera State Park
Andrew Molera State Park is a coastal California state park in Big Sur known for its undeveloped beaches, scenic hiking trails, and rugged natural landscapes along the Pacific Ocean.
-
C.
Lomond Hills Regional Park
Lomond Hills Regional Park is a protected natural area in Fife, Scotland, known for its scenic upland landscapes, walking trails, and wildlife habitats around the Lomond Hills.
-
D.
Coyote Point Recreation Area
Coyote Point Recreation Area is a popular bayside park in San Mateo, California, known for its waterfront views, picnic areas, trails, marina, and the CuriOdyssey science and wildlife center.
-
E.
Malibu Creek State Park
Malibu Creek State Park is a scenic natural area in the Santa Monica Mountains of Southern California, known for its rugged canyons, hiking trails, and use as a filming location for numerous movies and TV shows.
- 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: Contra Loma Regional Park Target entity description: Contra Loma Regional Park is a public recreation area in Contra Costa County, California, known for its reservoir, fishing, swimming lagoon, and hiking and biking trails.
-
A.
Briones Regional Park
Briones Regional Park is a large East Bay regional park in the hills of central Contra Costa County, California, known for its open grasslands, oak woodlands, and extensive hiking and equestrian trails.
-
B.
Andrew Molera State Park
Andrew Molera State Park is a coastal California state park in Big Sur known for its undeveloped beaches, scenic hiking trails, and rugged natural landscapes along the Pacific Ocean.
-
C.
Lomond Hills Regional Park
Lomond Hills Regional Park is a protected natural area in Fife, Scotland, known for its scenic upland landscapes, walking trails, and wildlife habitats around the Lomond Hills.
-
D.
Coyote Point Recreation Area
Coyote Point Recreation Area is a popular bayside park in San Mateo, California, known for its waterfront views, picnic areas, trails, marina, and the CuriOdyssey science and wildlife center.
-
E.
Malibu Creek State Park
Malibu Creek State Park is a scenic natural area in the Santa Monica Mountains of Southern California, known for its rugged canyons, hiking trails, and use as a filming location for numerous movies and TV shows.
- F. None of above. chosen
Statements (45)
| Predicate | Object |
|---|---|
| instanceOf |
public recreation area
ⓘ
regional park ⓘ |
| activity |
biking
ⓘ
birdwatching ⓘ fishing ⓘ hiking ⓘ picnicking ⓘ swimming ⓘ wildlife viewing ⓘ |
| category |
East Bay Regional Park District
ⓘ
Parks in Contra Costa County, California ⓘ Protected areas of the San Francisco Bay Area ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| county | Contra Costa County ⓘ |
| ecosystem |
California chaparral and grassland
ⓘ
reservoir shoreline habitat ⓘ |
| hasFacility |
barbecue pits
ⓘ
lifeguarded swim area (seasonal) ⓘ multi-use trails ⓘ parking areas ⓘ restrooms ⓘ |
| hasPart |
Contra Loma Reservoir
ⓘ
biking trails ⓘ boat launch facilities ⓘ fishing areas ⓘ hiking trails ⓘ picnic areas ⓘ shoreline access ⓘ swimming lagoon ⓘ |
| hasWaterBody | Contra Loma Reservoir ⓘ |
| hasWildlife |
fish species in reservoir
ⓘ
raptors ⓘ waterfowl ⓘ |
| locatedIn | Antioch, California ⓘ |
| managingOrganization | East Bay Regional Park District ⓘ |
| near |
Black Diamond Mines Regional Preserve
ⓘ
Dow Wetlands Preserve ⓘ |
| operator | East Bay Regional Park District ⓘ |
| primaryUse | outdoor recreation ⓘ |
| region |
East Bay
ⓘ
San Francisco Bay Area ⓘ |
| state |
California, United States
ⓘ
surface form:
California
|
| waterRecreation |
canoeing
ⓘ
kayaking ⓘ non-motorized boating ⓘ |
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: Contra Loma Regional Park Description of subject: Contra Loma Regional Park is a public recreation area in Contra Costa County, California, known for its reservoir, fishing, swimming lagoon, and hiking and biking trails.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.