SSBN-642
E842025
James Madison-class ballistic missile submarine
United States Navy submarine
ballistic missile submarine class
hull number
nuclear-powered submarine
person
SSBN-642 is the hull number assigned to USS Brien McMahon, a U.S. Navy James Madison-class nuclear-powered ballistic missile submarine that served during the Cold War.
All labels observed (1)
| Label | Occurrences |
|---|---|
| SSBN-642 canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10107655 — 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: SSBN-642 Context triple: [USS Brien McMahon (SSBN-642), hullNumber, SSBN-642]
-
A.
SSBN S30
SSBN S30 is the NATO reporting name for HMS Vigilant, a British Vanguard-class nuclear-powered ballistic missile submarine in the Royal Navy's strategic deterrent fleet.
-
B.
SSN-571
SSN-571 is the hull number of USS Nautilus, the world’s first operational nuclear-powered submarine and a pioneering vessel in naval history.
-
C.
USS George Washington (SSBN-598)
USS George Washington (SSBN-598) was the United States Navy’s first operational ballistic missile submarine and a pioneering platform of the nuclear deterrent fleet during the Cold War.
-
D.
USS Columbia (SSBN-826)
USS Columbia (SSBN-826) is the lead boat of the U.S. Navy’s next-generation Columbia-class nuclear-powered ballistic missile submarines, designed to replace the aging Ohio-class as a key component of the United States’ sea-based nuclear deterrent.
-
E.
USS Maryland (SSBN-738)
USS Maryland (SSBN-738) is an Ohio-class nuclear-powered ballistic missile submarine of the United States Navy, designed for strategic deterrence patrols.
- 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: SSBN-642 Target entity description: SSBN-642 is the hull number assigned to USS Brien McMahon, a U.S. Navy James Madison-class nuclear-powered ballistic missile submarine that served during the Cold War.
-
A.
SSBN S30
SSBN S30 is the NATO reporting name for HMS Vigilant, a British Vanguard-class nuclear-powered ballistic missile submarine in the Royal Navy's strategic deterrent fleet.
-
B.
SSN-571
SSN-571 is the hull number of USS Nautilus, the world’s first operational nuclear-powered submarine and a pioneering vessel in naval history.
-
C.
USS George Washington (SSBN-598)
USS George Washington (SSBN-598) was the United States Navy’s first operational ballistic missile submarine and a pioneering platform of the nuclear deterrent fleet during the Cold War.
-
D.
USS Columbia (SSBN-826)
USS Columbia (SSBN-826) is the lead boat of the U.S. Navy’s next-generation Columbia-class nuclear-powered ballistic missile submarines, designed to replace the aging Ohio-class as a key component of the United States’ sea-based nuclear deterrent.
-
E.
USS Maryland (SSBN-738)
USS Maryland (SSBN-738) is an Ohio-class nuclear-powered ballistic missile submarine of the United States Navy, designed for strategic deterrence patrols.
- F. None of above. chosen
Statements (29)
| Predicate | Object |
|---|---|
| instanceOf |
James Madison-class ballistic missile submarine
ⓘ
United States Navy submarine ⓘ ballistic missile submarine class ⓘ hull number ⓘ nuclear-powered submarine ⓘ person ⓘ |
| assignedTo | USS Brien McMahon NERFINISHED ⓘ |
| ballisticMissileSubmarine | true ⓘ |
| class | James Madison class NERFINISHED ⓘ |
| country |
United States
ⓘ
linked to:
United States of America
|
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
United States ⓘ
linked to:
United States of America
|
| era | Cold War ⓘ |
| fleet | United States Atlantic Fleet NERFINISHED ⓘ |
| hullNumber | SSBN-642 NERFINISHED ⓘ |
| namedAfter | Brien McMahon NERFINISHED ⓘ |
| navy | United States Navy NERFINISHED ⓘ |
| nuclearMissileCapability | true ⓘ |
| nuclearPowered | true ⓘ |
| occupation | United States Senator NERFINISHED ⓘ |
| operator |
United States Navy
ⓘ
United States Navy ⓘ |
| primaryArmament | submarine-launched ballistic missiles ⓘ |
| propulsion | nuclear-powered ⓘ |
| role | strategic deterrent ⓘ |
| serviceBranch | United States Navy ⓘ |
| servicePeriod | Cold War NERFINISHED ⓘ |
| shipType | ballistic missile submarine ⓘ |
| strategicWeaponsPlatform | true ⓘ |
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: SSBN-642 Description of subject: SSBN-642 is the hull number assigned to USS Brien McMahon, a U.S. Navy James Madison-class nuclear-powered ballistic missile submarine that served during the Cold War.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
United States Navy submarine USS Brien McMahon (SSBN-642) named in his honor