Ethan Allen-class submarine
E797123
The Ethan Allen-class submarine was a series of early U.S. Navy nuclear-powered ballistic missile submarines designed specifically to carry and launch strategic Polaris missiles during the Cold War.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Ethan Allen-class submarine canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T9387455 — 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: Ethan Allen-class submarine Context triple: [Polaris missile system, primaryLaunchPlatform, Ethan Allen-class submarine]
-
A.
George Washington-class submarine
The George Washington-class submarine was the United States Navy’s first class of nuclear-powered ballistic missile submarines, pioneering sea-based strategic nuclear deterrence during the Cold War.
-
B.
Upholder-class submarine
The Upholder-class submarine was a class of diesel-electric attack submarines built for the Royal Navy in the late 20th century, later modernized and transferred to Canada where they became the Victoria-class.
-
C.
Vanguard-class submarine
The Vanguard-class submarine is a class of British nuclear-powered ballistic missile submarines that form the seaborne leg of the United Kingdom’s strategic nuclear deterrent.
-
D.
Astute-class submarine
The Astute-class submarine is a fleet of advanced nuclear-powered attack submarines built for the Royal Navy, known for their stealth, endurance, and sophisticated weapons and sensor systems.
-
E.
Archer-class submarine
The Archer-class submarine is a class of modern diesel-electric attack submarines, originally built for the Swedish Navy and later upgraded and operated by the Republic of Singapore Navy for stealthy underwater operations.
- 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: Ethan Allen-class submarine Target entity description: The Ethan Allen-class submarine was a series of early U.S. Navy nuclear-powered ballistic missile submarines designed specifically to carry and launch strategic Polaris missiles during the Cold War.
-
A.
George Washington-class submarine
The George Washington-class submarine was the United States Navy’s first class of nuclear-powered ballistic missile submarines, pioneering sea-based strategic nuclear deterrence during the Cold War.
-
B.
Upholder-class submarine
The Upholder-class submarine was a class of diesel-electric attack submarines built for the Royal Navy in the late 20th century, later modernized and transferred to Canada where they became the Victoria-class.
-
C.
Vanguard-class submarine
The Vanguard-class submarine is a class of British nuclear-powered ballistic missile submarines that form the seaborne leg of the United Kingdom’s strategic nuclear deterrent.
-
D.
Astute-class submarine
The Astute-class submarine is a fleet of advanced nuclear-powered attack submarines built for the Royal Navy, known for their stealth, endurance, and sophisticated weapons and sensor systems.
-
E.
Archer-class submarine
The Archer-class submarine is a class of modern diesel-electric attack submarines, originally built for the Swedish Navy and later upgraded and operated by the Republic of Singapore Navy for stealthy underwater operations.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf | ballistic missile submarine class ⓘ |
| armamentCategory | submarine-launched ballistic missile ⓘ |
| category |
Ballistic missile submarines of the United States Navy
ⓘ
Cold War submarines of the United States ⓘ Nuclear submarines of the United States Navy ⓘ |
| classificationSymbol | SSBN-608-class NERFINISHED ⓘ |
| conflict | Cold War ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| designedBy | U.S. Navy Bureau of Ships NERFINISHED ⓘ |
| designedFor | Polaris ballistic missile NERFINISHED ⓘ |
| designedTo |
carry Polaris missiles
ⓘ
launch submarine-launched ballistic missiles ⓘ |
| era | early Cold War ⓘ |
| fleetType | SSBN NERFINISHED ⓘ |
| launchPlatformFor | strategic nuclear weapons ⓘ |
| missileTypeCarried | UGM-27 Polaris NERFINISHED ⓘ |
| namedAfter | Ethan Allen NERFINISHED ⓘ |
| navalArchitectureFeature | single-hull design ⓘ |
| nuclearCapability | nuclear-armed SLBM platform ⓘ |
| numberBuilt | 5 ⓘ |
| operator | United States Navy ⓘ |
| powerPlantType | pressurized-water reactor ⓘ |
| precededBy | George Washington-class submarine NERFINISHED ⓘ |
| primaryRole | strategic nuclear deterrent ⓘ |
| propulsion | nuclear reactor ⓘ |
| serviceBranch | U.S. Navy NERFINISHED ⓘ |
| shipInClass |
USS Ethan Allen (SSBN-608)
NERFINISHED
ⓘ
USS John Marshall (SSBN-611) NERFINISHED ⓘ USS Sam Houston (SSBN-609) NERFINISHED ⓘ USS Thomas A. Edison (SSBN-610) NERFINISHED ⓘ USS Thomas Jefferson (SSBN-618) NERFINISHED ⓘ |
| strategicMission | deterrence patrols ⓘ |
| strategicRole | sea-based leg of U.S. nuclear triad ⓘ |
| succeededBy | Lafayette-class submarine NERFINISHED ⓘ |
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: Ethan Allen-class submarine Description of subject: The Ethan Allen-class submarine was a series of early U.S. Navy nuclear-powered ballistic missile submarines designed specifically to carry and launch strategic Polaris missiles during the Cold War.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.