Mark 18 nuclear bomb
E851125
The Mark 18 nuclear bomb was an early high-yield thermonuclear weapon developed and deployed by the United States during the Cold War.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Mark 18 nuclear bomb canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T10223468 — 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 18 nuclear bomb Context triple: [Nuclear bombs of the United States, hasPart, Mark 18 nuclear bomb]
-
A.
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.
-
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 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.
-
D.
Mark 12 nuclear bomb
The Mark 12 nuclear bomb was an early lightweight, high-yield thermonuclear weapon developed and deployed by the United States during the 1950s.
-
E.
Mark 17 thermonuclear bomb
The Mark 17 thermonuclear bomb was one of the first operational U.S. hydrogen bombs, a large-yield, early Cold War-era strategic nuclear weapon.
- 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 18 nuclear bomb Target entity description: The Mark 18 nuclear bomb was an early high-yield thermonuclear weapon developed and deployed by the United States during the Cold War.
-
A.
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.
-
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 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.
-
D.
Mark 12 nuclear bomb
The Mark 12 nuclear bomb was an early lightweight, high-yield thermonuclear weapon developed and deployed by the United States during the 1950s.
-
E.
Mark 17 thermonuclear bomb
The Mark 17 thermonuclear bomb was one of the first operational U.S. hydrogen bombs, a large-yield, early Cold War-era strategic nuclear weapon.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf |
gravity bomb
ⓘ
nuclear weapon ⓘ thermonuclear weapon ⓘ |
| conflictContext | early Cold War arms race ⓘ |
| countryOfOrigin |
United States
ⓘ
linked to:
United States of America
|
| deliveryMethod | air-dropped ⓘ |
| deploymentPeriod | early 1950s ⓘ |
| deploymentStatus | deployed ⓘ |
| designBasis | Ivy King device ⓘ |
| designFeature |
levitated core
ⓘ
very large fission primary ⓘ |
| developedBy |
Los Alamos National Laboratory
ⓘ
linked to:
Los Alamos Laboratory
United States ⓘ
linked to:
United States of America
|
| diameter | approximately 61 inches ⓘ |
| era | Cold War ⓘ |
| historicalSignificance | one of the highest-yield pure-fission weapons ever fielded ⓘ |
| length | approximately 11.7 feet ⓘ |
| nuclearWeaponType | fission bomb ⓘ |
| numberBuilt | limited production run ⓘ |
| replacedBy | Mark 6 nuclear bomb variants ⓘ |
| retired | mid-1950s ⓘ |
| safetyFeature | in-flight insertion of nuclear core ⓘ |
| serviceEntry | 1953 ⓘ |
| usedBy | United States Air Force ⓘ |
| warheadCoreMaterial |
highly enriched uranium
ⓘ
plutonium ⓘ |
| weaponClass | strategic nuclear weapon ⓘ |
| weight | approximately 8,500 pounds ⓘ |
| yield | approximately 500 kilotons of TNT ⓘ |
| yieldType | 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: Mark 18 nuclear bomb Description of subject: The Mark 18 nuclear bomb was an early high-yield thermonuclear weapon developed and deployed by the United States during the Cold War.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.