James Madison-class submarine
E800490
The James Madison-class submarine was a series of U.S. Navy nuclear-powered ballistic missile submarines built during the Cold War to provide strategic nuclear deterrence.
All labels observed (4)
How this entity was disambiguated
This entity first appeared as the object of triple T9387457 — 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: James Madison-class submarine Context triple: [Polaris missile system, primaryLaunchPlatform, James Madison-class submarine]
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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.
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B.
Lafayette-class submarine
The Lafayette-class submarine was a series of U.S. Navy nuclear-powered ballistic missile submarines built during the Cold War to enhance the United States' strategic nuclear deterrent at sea.
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C.
Columbia-class submarine
The Columbia-class submarine is the U.S. Navy’s next-generation nuclear-powered ballistic missile submarine designed to replace the aging Ohio-class as the backbone of America’s sea-based nuclear deterrent.
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D.
Ethan Allen-class submarine
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.
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E.
Virginia-class submarine
The Virginia-class submarine is a class of nuclear-powered fast attack submarines used by the United States Navy, designed for a broad range of open-ocean and littoral missions with advanced stealth, surveillance, and strike capabilities.
- 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: James Madison-class submarine Target entity description: The James Madison-class submarine was a series of U.S. Navy nuclear-powered ballistic missile submarines built during the Cold War to provide strategic nuclear deterrence.
-
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.
Lafayette-class submarine
The Lafayette-class submarine was a series of U.S. Navy nuclear-powered ballistic missile submarines built during the Cold War to enhance the United States' strategic nuclear deterrent at sea.
-
C.
Columbia-class submarine
The Columbia-class submarine is the U.S. Navy’s next-generation nuclear-powered ballistic missile submarine designed to replace the aging Ohio-class as the backbone of America’s sea-based nuclear deterrent.
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D.
Ethan Allen-class submarine
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.
-
E.
Virginia-class submarine
The Virginia-class submarine is a class of nuclear-powered fast attack submarines used by the United States Navy, designed for a broad range of open-ocean and littoral missions with advanced stealth, surveillance, and strike capabilities.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf | ballistic missile submarine class ⓘ |
| armament |
submarine-launched ballistic missiles
ⓘ
torpedoes ⓘ |
| belongsTo | United States Navy submarine classes NERFINISHED ⓘ |
| belongsToCategory | Cold War submarines of the United States ⓘ |
| builtFor | United States Navy NERFINISHED ⓘ |
| category | nuclear ballistic missile submarines of the United States ⓘ |
| classification | fleet ballistic missile submarine ⓘ |
| conflict | Cold War ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crewEnvironment | submerged operations for extended patrols ⓘ |
| deploymentEnvironment | open ocean ⓘ |
| deploymentPattern | continuous at-sea deterrent patrols ⓘ |
| designedBy | United States naval architects ⓘ |
| designedFor | ballistic missile deployment ⓘ |
| designPurpose | long-endurance submerged operations ⓘ |
| era | Cold War era ⓘ |
| followedBy | Benjamin Franklin-class submarine NERFINISHED ⓘ |
| hasCrewType | Blue and Gold crews ⓘ |
| hasHullClassificationSymbol | SSBN NERFINISHED ⓘ |
| isPartOf | U.S. Navy SSBN force NERFINISHED ⓘ |
| launchPlatformFor |
Polaris ballistic missiles
NERFINISHED
ⓘ
Poseidon ballistic missiles NERFINISHED ⓘ Trident I C4 ballistic missiles NERFINISHED ⓘ |
| missionProfile | nuclear deterrent patrols ⓘ |
| namedAfter | James Madison NERFINISHED ⓘ |
| navalClass | James Madison class NERFINISHED ⓘ |
| nuclearTriadComponent | sea-based leg ⓘ |
| operator | United States Navy ⓘ |
| partOf |
U.S. Navy submarine fleet
ⓘ
United States strategic nuclear forces NERFINISHED ⓘ |
| poweredBy | nuclear reactor ⓘ |
| precededBy | Lafayette-class submarine NERFINISHED ⓘ |
| primaryMission | sea-based nuclear deterrence ⓘ |
| propulsion | nuclear-powered ⓘ |
| role | strategic nuclear deterrent ⓘ |
| serviceBranch | United States Navy ⓘ |
| stealthFeature | ability to remain hidden underwater for extended periods ⓘ |
| strategicAssetFor | United States NERFINISHED ⓘ |
| strategicDoctrine | mutually assured destruction ⓘ |
| strategicFunction | deterrence patrols ⓘ |
| strategicImportance | high ⓘ |
| strategicRole | second-strike capability ⓘ |
| submarineType | SSBN ⓘ |
| technology | submarine-launched ballistic missile system ⓘ |
| usedBy | United States Navy ⓘ |
| usedIn | Cold War nuclear deterrence strategy ⓘ |
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: James Madison-class submarine Description of subject: The James Madison-class submarine was a series of U.S. Navy nuclear-powered ballistic missile submarines built during the Cold War to provide strategic nuclear deterrence.
Referenced by (7)
Full triples — surface form annotated when it differs from this entity's canonical label.
United States Navy submarine USS Brien McMahon (SSBN-642) named in his honor
→
category
→
James Madison-class submarine
ⓘ
subject surface form:
USS Brien McMahon (SSBN-642)
this entity surface form:
James Madison-class ballistic missile submarines
subject surface form:
Ohio-class submarine
this entity surface form:
James Madison-class ballistic missile submarine
this entity surface form:
Benjamin Franklin-class ballistic missile submarine