San Clemente Island
E171078
San Clemente Island is a remote, rocky island off the Southern California coast that serves primarily as a U.S. Navy training and testing range and important habitat for several endemic species.
All labels observed (5)
How this entity was disambiguated
This entity first appeared as the object of triple T852027 — 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 Clemente Island Context triple: [Channel Islands of California, hasPart, San Clemente Island]
-
A.
Santa Barbara Island
Santa Barbara Island is a small, remote volcanic island off the coast of Southern California known for its rugged cliffs, seabird colonies, and protected natural habitats within the Channel Islands archipelago.
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B.
San Miguel Island
San Miguel Island is the westernmost of California’s Channel Islands, known for its rugged windswept landscape, rich marine wildlife, and protected status within Channel Islands National Park.
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C.
Anacapa Island
Anacapa Island is a small, rugged volcanic island off the coast of Southern California known for its dramatic sea cliffs, rich seabird colonies, and iconic lighthouse.
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D.
Santa Clara Island
Santa Clara Island is a small, uninhabited island in Chile’s Pacific Juan Fernández archipelago, known for its rugged terrain and unique, protected ecosystems.
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E.
Santa Rosa Island
Santa Rosa Island is one of California’s Channel Islands known for its rugged coastal landscapes, rare wildlife, and archaeological sites spanning thousands of years of human history.
- 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 Clemente Island Target entity description: San Clemente Island is a remote, rocky island off the Southern California coast that serves primarily as a U.S. Navy training and testing range and important habitat for several endemic species.
-
A.
Santa Barbara Island
Santa Barbara Island is a small, remote volcanic island off the coast of Southern California known for its rugged cliffs, seabird colonies, and protected natural habitats within the Channel Islands archipelago.
-
B.
San Miguel Island
San Miguel Island is the westernmost of California’s Channel Islands, known for its rugged windswept landscape, rich marine wildlife, and protected status within Channel Islands National Park.
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C.
Anacapa Island
Anacapa Island is a small, rugged volcanic island off the coast of Southern California known for its dramatic sea cliffs, rich seabird colonies, and iconic lighthouse.
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D.
Santa Clara Island
Santa Clara Island is a small, uninhabited island in Chile’s Pacific Juan Fernández archipelago, known for its rugged terrain and unique, protected ecosystems.
-
E.
Santa Rosa Island
Santa Rosa Island is one of California’s Channel Islands known for its rugged coastal landscapes, rare wildlife, and archaeological sites spanning thousands of years of human history.
- F. None of above. chosen
Statements (52)
| Predicate | Object |
|---|---|
| instanceOf |
U.S. Navy training range
ⓘ
island ⓘ |
| administeredBy | United States Navy ⓘ |
| area |
about 148 square kilometers
ⓘ
about 57 square miles ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| county | Los Angeles County ⓘ |
| discoveredByEuropeans | Sebastián Vizcaíno ⓘ |
| ecoregion | Mediterranean climate ⓘ |
| endemicSpecies |
San Clemente Island broom
ⓘ
San Clemente Island bush mallow ⓘ San Clemente Island fox ⓘ San Clemente Island larkspur ⓘ San Clemente Island paintbrush ⓘ San Clemente loggerhead shrike ⓘ |
| environmentalManagement | Navy Integrated Natural Resources Management Plan ⓘ |
| europeanDiscoveryYear | 1602 ⓘ |
| floraFauna | endemic species ⓘ |
| hasLighthouse | San Clemente Island Light ⓘ |
| highestElevation |
about 1,965 feet
ⓘ
about 599 meters ⓘ |
| highestPoint | Mount Thirst ⓘ |
| historicalInhabitants |
Chumash people
ⓘ
Tongva people ⓘ |
| importantFor | endangered species recovery ⓘ |
| length |
about 21 miles
ⓘ
about 34 kilometers ⓘ |
| locatedIn |
Pacific Ocean
ⓘ
Southern California Bight ⓘ |
| maximumWidth |
about 4.5 miles
ⓘ
about 7.2 kilometers ⓘ |
| militaryInstallation | Naval Auxiliary Landing Field San Clemente Island ⓘ |
| militaryUseSince | 1930s ⓘ |
| namedAfter |
Saint Clement of Rome
ⓘ
linked to:
Clement of Rome
|
| nearestCity | San Diego ⓘ |
| operatedBy |
U.S. Navy
ⓘ
linked to:
United States Navy
|
| partOf | Channel Islands of California ⓘ |
| population | no permanent civilian population ⓘ |
| restrictedAccess | true ⓘ |
| runwayLength |
about 2,835 meters
ⓘ
about 9,300 feet ⓘ |
| state |
California
ⓘ
linked to:
California, United States
|
| terrain |
marine terraces
ⓘ
rocky ⓘ steep sea cliffs ⓘ |
| usedFor |
air-to-ground bombing practice
ⓘ
amphibious warfare training ⓘ electronic warfare testing ⓘ military training ⓘ naval gunfire support training ⓘ sonar testing ⓘ weapons testing ⓘ |
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 Clemente Island Description of subject: San Clemente Island is a remote, rocky island off the Southern California coast that serves primarily as a U.S. Navy training and testing range and important habitat for several endemic species.
Referenced by (22)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: San Clemente Island
linked to: San Clemente Island
Naval Auxiliary Landing Field San Clemente Island
→
partOf
→
San Clemente Island military installation
ⓘ
linked to: San Clemente Island
linked to: San Clemente Island