Johnston Atoll
E151874
Johnston Atoll is a remote, uninhabited coral atoll in the central Pacific Ocean that has historically been used by the United States for military operations and weapons testing.
All labels observed (3)
| Label | Occurrences |
|---|---|
| Johnston Atoll canonical | 8 |
| Johnston Atoll National Wildlife Refuge | 1 |
| U.S. territory of Johnston Atoll | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T809704 — 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: Johnston Atoll Context triple: [U.S. Pacific territories, hasMember, Johnston Atoll]
-
A.
Rose Atoll
Rose Atoll is a remote, uninhabited coral atoll in the South Pacific Ocean known for its rich marine biodiversity and status as a protected wildlife refuge.
-
B.
Rongelap Atoll
Rongelap Atoll is a coral atoll in the central Pacific Ocean best known for being heavily contaminated by fallout from U.S. nuclear testing at Bikini Atoll in the 1950s.
-
C.
Wake Island
Wake Island is a remote coral atoll in the central Pacific Ocean that served as a strategic military outpost, notably during World War II.
-
D.
Likiep Atoll
Likiep Atoll is a coral atoll in the Ratak Chain of the Marshall Islands, known for its lagoon, traditional Marshallese culture, and historical copra plantations.
-
E.
Tarawa Atoll
Tarawa Atoll is a coral atoll in the central Pacific Ocean that serves as the capital of Kiribati and was a major World War II battleground.
- 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: Johnston Atoll Target entity description: Johnston Atoll is a remote, uninhabited coral atoll in the central Pacific Ocean that has historically been used by the United States for military operations and weapons testing.
-
A.
Rose Atoll
Rose Atoll is a remote, uninhabited coral atoll in the South Pacific Ocean known for its rich marine biodiversity and status as a protected wildlife refuge.
-
B.
Rongelap Atoll
Rongelap Atoll is a coral atoll in the central Pacific Ocean best known for being heavily contaminated by fallout from U.S. nuclear testing at Bikini Atoll in the 1950s.
-
C.
Wake Island
Wake Island is a remote coral atoll in the central Pacific Ocean that served as a strategic military outpost, notably during World War II.
-
D.
Likiep Atoll
Likiep Atoll is a coral atoll in the Ratak Chain of the Marshall Islands, known for its lagoon, traditional Marshallese culture, and historical copra plantations.
-
E.
Tarawa Atoll
Tarawa Atoll is a coral atoll in the central Pacific Ocean that serves as the capital of Kiribati and was a major World War II battleground.
- F. None of above. chosen
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
United States Minor Outlying Island
ⓘ
coral atoll ⓘ unincorporated territory of the United States ⓘ |
| administeredAs |
Johnston Atoll National Wildlife Refuge
ⓘ
Pacific Remote Islands Marine National Monument ⓘ |
| administeredBy |
United States Fish and Wildlife Service
ⓘ
linked to:
U.S. Fish and Wildlife Service
|
| area | approximately 2.67 square kilometers ⓘ |
| country | United States of America ⓘ |
| discoveredBy | Captain Charles J. Johnston ⓘ |
| discoveryClaimedBy | HMS Cornwallis ⓘ |
| discoveryYear | 1807 ⓘ |
| distanceToHawaii | approximately 1328 kilometers southwest of Honolulu ⓘ |
| elevation | approximately 5 meters above sea level ⓘ |
| environmentalStatus |
marine protected area
ⓘ
wildlife refuge ⓘ |
| formerUse |
chemical weapons destruction facility
ⓘ
nuclear weapons test site ⓘ |
| hasPart |
Akau Island
NERFINISHED
ⓘ
Hikina Island NERFINISHED ⓘ Johnston Island ⓘ Sand Island ⓘ |
| hostedFacility | Johnston Atoll Chemical Agent Disposal System ⓘ |
| ISOCode | UM-86 ⓘ |
| landArea | approximately 2.67 square kilometers ⓘ |
| locatedIn |
North Pacific Ocean
ⓘ
linked to:
Pacific Ocean
central Pacific Ocean ⓘ
linked to:
Central Pacific Ocean
|
| nearestMajorLandmass | Hawaii ⓘ |
| nuclearTestsConducted | high-altitude nuclear tests ⓘ |
| nuclearTestSeries |
Operation Dominic
ⓘ
linked to:
Operation Dominic I and II
Operation Hardtack II ⓘ |
| partOf |
Pacific Remote Islands Marine National Monument
ⓘ
United States Minor Outlying Islands ⓘ
linked to:
U.S. Pacific unorganized territories
|
| population | 0 permanent residents ⓘ |
| runwayLength | approximately 2700 meters ⓘ |
| sovereigntyClaimedBy | United States of America ⓘ |
| status |
closed military installation
ⓘ
restricted access area ⓘ |
| timeZone | UTC−10:00 ⓘ |
| uninhabited | true ⓘ |
| usedBy |
Atomic Energy Commission
ⓘ
linked to:
United States Atomic Energy Commission
Defense Threat Reduction Agency ⓘ Department of Defense ⓘ United States Air Force ⓘ United States Army ⓘ United States Fish and Wildlife Service ⓘ
linked to:
U.S. Fish and Wildlife Service
United States Navy ⓘ |
| usedFor |
chemical weapons storage
ⓘ
military operations ⓘ missile 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: Johnston Atoll Description of subject: Johnston Atoll is a remote, uninhabited coral atoll in the central Pacific Ocean that has historically been used by the United States for military operations and weapons testing.
Referenced by (10)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Johnston Atoll
linked to: Johnston Atoll