W49 warhead
E865253
The W49 warhead was an early high-yield thermonuclear warhead developed by the United States during the Cold War for use in ballistic missile systems.
All labels observed (1)
| Label | Occurrences |
|---|---|
| W49 warhead canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10223496 — 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: W49 warhead Context triple: [Nuclear bombs of the United States, hasPart, W49 warhead]
-
A.
W47 warhead
The W47 warhead was a compact American thermonuclear warhead designed primarily for deployment on Polaris submarine-launched ballistic missiles during the Cold War.
-
B.
W56 warhead
The W56 warhead is a high-yield thermonuclear warhead developed by the United States during the Cold War, primarily deployed on Minuteman intercontinental ballistic missiles.
-
C.
W78 warhead
The W78 warhead is an American MIRV-capable thermonuclear warhead designed for deployment on intercontinental ballistic missiles.
-
D.
W62 warhead
The W62 warhead is a U.S. thermonuclear warhead developed during the Cold War for use on intercontinental ballistic missiles, notably the Minuteman III.
-
E.
W87 warhead
The W87 warhead is an American MIRV-capable thermonuclear warhead originally designed for the LGM-118A Peacekeeper intercontinental ballistic missile and later adapted for use on Minuteman III ICBMs.
- 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: W49 warhead Target entity description: The W49 warhead was an early high-yield thermonuclear warhead developed by the United States during the Cold War for use in ballistic missile systems.
-
A.
W47 warhead
The W47 warhead was a compact American thermonuclear warhead designed primarily for deployment on Polaris submarine-launched ballistic missiles during the Cold War.
-
B.
W56 warhead
The W56 warhead is a high-yield thermonuclear warhead developed by the United States during the Cold War, primarily deployed on Minuteman intercontinental ballistic missiles.
-
C.
W78 warhead
The W78 warhead is an American MIRV-capable thermonuclear warhead designed for deployment on intercontinental ballistic missiles.
-
D.
W62 warhead
The W62 warhead is a U.S. thermonuclear warhead developed during the Cold War for use on intercontinental ballistic missiles, notably the Minuteman III.
-
E.
W87 warhead
The W87 warhead is an American MIRV-capable thermonuclear warhead originally designed for the LGM-118A Peacekeeper intercontinental ballistic missile and later adapted for use on Minuteman III ICBMs.
- F. None of above. chosen
Statements (34)
| Predicate | Object |
|---|---|
| instanceOf | thermonuclear warhead ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| deploymentPlatform |
ICBM
ⓘ
IRBM ⓘ land-based ballistic missile ⓘ |
| derivedFromDesign | TX-28 warhead NERFINISHED ⓘ |
| designedFor |
ballistic missile
ⓘ
intercontinental ballistic missile ⓘ intermediate-range ballistic missile ⓘ |
| designLineage | Mark 28 thermonuclear bomb NERFINISHED ⓘ |
| designPurpose | strategic nuclear deterrence ⓘ |
| developedBy | United States NERFINISHED ⓘ |
| era | Cold War ⓘ |
| hasNATOReportingName | W49 NERFINISHED ⓘ |
| historicalContext | early US ballistic missile armament ⓘ |
| nuclearWeaponConfiguration | two-stage radiation implosion ⓘ |
| nuclearWeaponType | two-stage thermonuclear ⓘ |
| partOf | United States nuclear arsenal NERFINISHED ⓘ |
| role | strategic warhead ⓘ |
| serviceEntryPeriod |
around 1959
ⓘ
late 1950s ⓘ |
| status | retired ⓘ |
| usedBy |
United States Air Force
ⓘ
United States Army ⓘ |
| usedIn | Cold War NERFINISHED ⓘ |
| usedOnWeaponSystem |
Atlas missile
NERFINISHED
ⓘ
Jupiter missile NERFINISHED ⓘ Redstone missile NERFINISHED ⓘ Thor missile NERFINISHED ⓘ Titan I missile NERFINISHED ⓘ |
| warheadFamily | Mark 28 family NERFINISHED ⓘ |
| warheadNumber | W49 NERFINISHED ⓘ |
| yieldClass | high-yield ⓘ |
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: W49 warhead Description of subject: The W49 warhead was an early high-yield thermonuclear warhead developed by the United States during the Cold War for use in ballistic missile systems.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.