Johnston Atoll Chemical Agent Disposal System
E281065
The Johnston Atoll Chemical Agent Disposal System was a U.S. military facility in the Pacific used to safely destroy and dispose of stockpiled chemical weapons.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Johnston Atoll Chemical Agent Disposal System canonical | 2 |
| Johnston Atoll weapons testing complex | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2574401 — 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 Chemical Agent Disposal System Context triple: [U.S. Chemical Demilitarization Program, primarySites, Johnston Atoll Chemical Agent Disposal System]
-
A.
Tooele Chemical Agent Disposal Facility
The Tooele Chemical Agent Disposal Facility was a major U.S. Army installation in Utah responsible for safely destroying a large portion of the nation’s stockpile of chemical weapons.
-
B.
Pueblo Chemical Depot
Pueblo Chemical Depot is a U.S. Army installation in Colorado historically used for the storage and destruction of chemical weapons.
-
C.
Albrook Air Force Station
Albrook Air Force Station was a major United States Air Force installation in the former Panama Canal Zone that played a key role in regional air operations and defense.
-
D.
Dugway Proving Ground
Dugway Proving Ground is a large U.S. Army facility in Utah primarily used for testing chemical, biological, radiological, and defense systems in a remote desert environment.
-
E.
Onizuka Air Force Station
Onizuka Air Force Station was a U.S. Air Force installation in California best known for its role in military space operations and for being named in honor of astronaut Ellison Onizuka.
- 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 Chemical Agent Disposal System Target entity description: The Johnston Atoll Chemical Agent Disposal System was a U.S. military facility in the Pacific used to safely destroy and dispose of stockpiled chemical weapons.
-
A.
Tooele Chemical Agent Disposal Facility
The Tooele Chemical Agent Disposal Facility was a major U.S. Army installation in Utah responsible for safely destroying a large portion of the nation’s stockpile of chemical weapons.
-
B.
Pueblo Chemical Depot
Pueblo Chemical Depot is a U.S. Army installation in Colorado historically used for the storage and destruction of chemical weapons.
-
C.
Albrook Air Force Station
Albrook Air Force Station was a major United States Air Force installation in the former Panama Canal Zone that played a key role in regional air operations and defense.
-
D.
Dugway Proving Ground
Dugway Proving Ground is a large U.S. Army facility in Utah primarily used for testing chemical, biological, radiological, and defense systems in a remote desert environment.
-
E.
Onizuka Air Force Station
Onizuka Air Force Station was a U.S. Air Force installation in California best known for its role in military space operations and for being named in honor of astronaut Ellison Onizuka.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
United States military installation
ⓘ
chemical weapons destruction facility ⓘ |
| constructionStart | late 1980s ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| demolitionDate | early 2000s ⓘ |
| destroyedChemicalAgent |
blister agent H
ⓘ
blister agent HD (sulfur mustard) ⓘ blister agent HT ⓘ nerve agent GB (sarin) ⓘ nerve agent VX ⓘ
linked to:
VX gas
|
| destroyedMunitionsType |
artillery shells
ⓘ
bombs ⓘ bulk agent containers ⓘ rockets ⓘ |
| distanceFromHawaii | approximately 825 miles southwest of Hawaii ⓘ |
| endDate | 2000 ⓘ |
| environmentalConcern |
air emissions
ⓘ
potential contamination of atoll ecosystem ⓘ |
| hasComponent |
agent processing building
ⓘ
deactivation furnace system ⓘ liquid incinerator ⓘ metal parts furnace ⓘ pollution abatement system ⓘ |
| inception | 1985 ⓘ |
| legalBasis |
Chemical Weapons Convention
ⓘ
Public Law 99-145 ⓘ |
| locatedOn |
U.S. territory of Johnston Atoll
ⓘ
linked to:
Johnston Atoll
|
| location |
Johnston Atoll
ⓘ
Pacific Ocean ⓘ |
| notableFor |
first full-scale U.S. chemical weapons incineration facility
ⓘ
offshore destruction of U.S. chemical weapons stockpile ⓘ |
| operator |
U.S. Army Chemical Materials Activity
ⓘ
United States Army ⓘ |
| partOf |
U.S. Army Chemical Stockpile Disposal Program
ⓘ
linked to:
U.S. Chemical Demilitarization Program
U.S. chemical weapons demilitarization program ⓘ |
| purpose |
destruction of stockpiled chemical weapons
ⓘ
implementation of U.S. chemical weapons demilitarization program ⓘ safe disposal of chemical munitions ⓘ |
| safetyFeature |
extensive monitoring systems
ⓘ
multiple incinerator lines ⓘ redundant pollution control systems ⓘ |
| startDate | 1990 ⓘ |
| status | closed ⓘ |
| supervisedBy |
U.S. Army Chemical Materials Agency
ⓘ
linked to:
U.S. Army Chemical Materials Activity
U.S. Department of Defense ⓘ
linked to:
Department of Defense
|
| usesProcess |
high-temperature furnaces
ⓘ
incineration ⓘ pollution abatement systems ⓘ |
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 Chemical Agent Disposal System Description of subject: The Johnston Atoll Chemical Agent Disposal System was a U.S. military facility in the Pacific used to safely destroy and dispose of stockpiled chemical weapons.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
U.S. Chemical Demilitarization Program
→
primarySites
→
Johnston Atoll Chemical Agent Disposal System
ⓘ
subject linked to:
Sand Island
linked to: Johnston Atoll Chemical Agent Disposal System