Mark 5 nuclear bomb
E854464
The Mark 5 nuclear bomb was an early American fission weapon developed in the 1950s, notable for its relatively compact, gun-type design and use in various U.S. military delivery systems during the early Cold War.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mark 5 nuclear bomb canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T10223460 — 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: Mark 5 nuclear bomb Context triple: [Nuclear bombs of the United States, hasPart, Mark 5 nuclear bomb]
-
A.
Mark 3 nuclear bomb
The Mark 3 nuclear bomb was an early U.S. atomic weapon, a production version of the "Fat Man" design used at the end of World War II.
-
B.
Mark 1 nuclear bomb
The Mark 1 nuclear bomb, also known as "Little Boy," was the first nuclear weapon used in warfare, dropped by the United States on Hiroshima, Japan, in 1945.
-
C.
Mark 8 nuclear bomb
The Mark 8 was an early American nuclear bomb design, notable as a gun-type fission weapon developed in the early Cold War era.
-
D.
Mark 18 nuclear bomb
The Mark 18 nuclear bomb was an early high-yield thermonuclear weapon developed and deployed by the United States during the Cold War.
-
E.
Mark 13 nuclear bomb
The Mark 13 nuclear bomb was an early American air-dropped nuclear weapon developed during the Cold War era as part of the United States' first generation of strategic nuclear armaments.
- 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: Mark 5 nuclear bomb Target entity description: The Mark 5 nuclear bomb was an early American fission weapon developed in the 1950s, notable for its relatively compact, gun-type design and use in various U.S. military delivery systems during the early Cold War.
-
A.
Mark 3 nuclear bomb
The Mark 3 nuclear bomb was an early U.S. atomic weapon, a production version of the "Fat Man" design used at the end of World War II.
-
B.
Mark 1 nuclear bomb
The Mark 1 nuclear bomb, also known as "Little Boy," was the first nuclear weapon used in warfare, dropped by the United States on Hiroshima, Japan, in 1945.
-
C.
Mark 8 nuclear bomb
The Mark 8 was an early American nuclear bomb design, notable as a gun-type fission weapon developed in the early Cold War era.
-
D.
Mark 18 nuclear bomb
The Mark 18 nuclear bomb was an early high-yield thermonuclear weapon developed and deployed by the United States during the Cold War.
-
E.
Mark 13 nuclear bomb
The Mark 13 nuclear bomb was an early American air-dropped nuclear weapon developed during the Cold War era as part of the United States' first generation of strategic nuclear armaments.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
fission bomb
ⓘ
nuclear weapon ⓘ |
| compatibleAircraft |
B-29 Superfortress
ⓘ
B-36 Peacemaker ⓘ
linked to:
Convair B-36 Peacemaker
B-47 Stratojet ⓘ B-50 Superfortress ⓘ |
| configuration | two-part assembly with separate core ⓘ |
| coreType | plutonium ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| deliveryPlatform |
fighter-bomber
ⓘ
strategic bomber ⓘ |
| deployedBy |
United States Air Force
ⓘ
United States Navy ⓘ |
| designType | implosion-type ⓘ |
| developedBy |
U.S. Atomic Energy Commission
ⓘ
linked to:
United States Atomic Energy Commission
U.S. military ⓘ
linked to:
United States Armed Forces
United States ⓘ
linked to:
United States of America
|
| diameter | approximately 1.3 meters ⓘ |
| era | early Cold War ⓘ |
| filling | plutonium ⓘ |
| hasFeature |
mechanical safing system
ⓘ
multiple yield options ⓘ removable nuclear core ⓘ |
| introduced | 1952 ⓘ |
| length | approximately 3.2 meters ⓘ |
| nuclearWeaponType |
strategic nuclear weapon
ⓘ
tactical nuclear weapon ⓘ |
| numberBuilt | over 1000 units ⓘ |
| predecessor | Mark 4 nuclear bomb ⓘ |
| replaced | Mark 6 nuclear bomb ⓘ |
| retired | late 1950s ⓘ |
| safetyFeature | in-flight insertion of core ⓘ |
| serviceEntry | early 1950s ⓘ |
| status | retired ⓘ |
| successor | Mark 6 nuclear bomb ⓘ |
| usedAsWarheadFor |
M31 Honest John rocket
ⓘ
Redstone missile ⓘ
linked to:
Redstone missile family
|
| usedFor |
strategic deterrence
ⓘ
weapons testing ⓘ |
| usedInConflict | Cold War ⓘ |
| usedInTestSeries |
Operation Ivy
ⓘ
Operation Upshot–Knothole ⓘ |
| warheadDesignation | W5 ⓘ |
| warheadFamily | Mark 5/W5 series ⓘ |
| weight | approximately 1360 kilograms ⓘ |
| yield | between 6 and 120 kilotons of TNT ⓘ |
| yieldType | variable 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: Mark 5 nuclear bomb Description of subject: The Mark 5 nuclear bomb was an early American fission weapon developed in the 1950s, notable for its relatively compact, gun-type design and use in various U.S. military delivery systems during the early Cold War.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.