Cull Canyon Regional Recreation Area
E912812
Cull Canyon Regional Recreation Area is a public park in the East Bay known for its swim lagoon, picnic areas, and hiking trails managed by the East Bay Regional Park District.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cull Canyon Regional Recreation Area canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T11220948 — 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: Cull Canyon Regional Recreation Area Context triple: [Castro Valley, California, nearbyPark, Cull Canyon Regional Recreation Area]
-
A.
Cottonwood Canyon State Park
Cottonwood Canyon State Park is a large, rugged public recreation area along the John Day River in north-central Oregon, known for its dramatic canyons, hiking, camping, and wildlife viewing.
-
B.
Sloan Canyon National Conservation Area
Sloan Canyon National Conservation Area is a protected desert landscape in southern Nevada known for its extensive petroglyph sites, rugged canyons, and opportunities for hiking and wildlife viewing near the Las Vegas Valley.
-
C.
Wildcat Canyon Regional Park
Wildcat Canyon Regional Park is a large East Bay regional park in the hills above Richmond, California, known for its rugged canyons, open grasslands, and extensive hiking and biking trails.
-
D.
Fryman Canyon Park
Fryman Canyon Park is a popular hiking and recreation area in the Hollywood Hills known for its scenic trails, city views, and easy access from the San Fernando Valley.
-
E.
Eldorado Canyon State Park
Eldorado Canyon State Park is a scenic Colorado state park renowned for its dramatic sandstone cliffs, world-class rock climbing, and hiking trails along South Boulder Creek.
- 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: Cull Canyon Regional Recreation Area Target entity description: Cull Canyon Regional Recreation Area is a public park in the East Bay known for its swim lagoon, picnic areas, and hiking trails managed by the East Bay Regional Park District.
-
A.
Cottonwood Canyon State Park
Cottonwood Canyon State Park is a large, rugged public recreation area along the John Day River in north-central Oregon, known for its dramatic canyons, hiking, camping, and wildlife viewing.
-
B.
Sloan Canyon National Conservation Area
Sloan Canyon National Conservation Area is a protected desert landscape in southern Nevada known for its extensive petroglyph sites, rugged canyons, and opportunities for hiking and wildlife viewing near the Las Vegas Valley.
-
C.
Wildcat Canyon Regional Park
Wildcat Canyon Regional Park is a large East Bay regional park in the hills above Richmond, California, known for its rugged canyons, open grasslands, and extensive hiking and biking trails.
-
D.
Fryman Canyon Park
Fryman Canyon Park is a popular hiking and recreation area in the Hollywood Hills known for its scenic trails, city views, and easy access from the San Fernando Valley.
-
E.
Eldorado Canyon State Park
Eldorado Canyon State Park is a scenic Colorado state park renowned for its dramatic sandstone cliffs, world-class rock climbing, and hiking trails along South Boulder Creek.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
public park
ⓘ
recreation area ⓘ regional park ⓘ |
| category |
East Bay Regional Park District
NERFINISHED
ⓘ
Parks in Alameda County, California ⓘ Protected areas of the San Francisco Bay Area ⓘ |
| hasActivity |
birdwatching
ⓘ
fishing ⓘ hiking ⓘ picnicking ⓘ swimming ⓘ wildlife viewing ⓘ |
| hasBodyOfWater | Cull Canyon Reservoir NERFINISHED ⓘ |
| hasEnvironment |
canyon setting
ⓘ
grassland ⓘ oak woodland ⓘ |
| hasFacility |
accessible picnic sites
ⓘ
accessible restrooms ⓘ concession stand ⓘ lifeguard-supervised swim area ⓘ |
| hasFeature |
barbecue pits
ⓘ
fishing areas ⓘ hiking trails ⓘ lawn areas ⓘ parking lot ⓘ picnic areas ⓘ playground ⓘ reservoir ⓘ restrooms ⓘ swim lagoon ⓘ |
| hasRegulation |
day-use only
ⓘ
dogs allowed in some areas on leash ⓘ |
| hasTrailType | multi-use trails ⓘ |
| locatedIn |
Alameda County
ⓘ
surface form:
Alameda County, California
California, United States ⓘ
surface form:
California
Castro Valley, California NERFINISHED ⓘ San Francisco Bay Area ⓘ United States of America ⓘ
surface form:
United States
|
| managedBy | East Bay Regional Park District NERFINISHED ⓘ |
| near |
Castro Valley community
NERFINISHED
ⓘ
Cull Canyon Road NERFINISHED ⓘ |
| openedToPublic | 20th century ⓘ |
| ownedBy | East Bay Regional Park District NERFINISHED ⓘ |
| partOf | East Bay Regional Park District system ⓘ |
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: Cull Canyon Regional Recreation Area Description of subject: Cull Canyon Regional Recreation Area is a public park in the East Bay known for its swim lagoon, picnic areas, and hiking trails managed by the East Bay Regional Park District.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.