Little Boy
E50421
Little Boy was the codename for the uranium-based atomic bomb dropped on Hiroshima, Japan, by the United States on August 6, 1945, marking the first use of nuclear weapons in warfare.
All labels observed (4)
| Label | Occurrences |
|---|---|
| Little Boy canonical | 13 |
| Little Boy atomic bomb | 6 |
| Little Boy (Hiroshima uranium bomb) | 1 |
| the Little Boy | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T395984 — 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.
Target entity: Little Boy Context triple: [Project Y, notableProject, Little Boy]
-
A.
Fat Man
Fat Man was the plutonium implosion-type nuclear bomb detonated over Nagasaki, Japan, in August 1945, contributing to the end of World War II.
-
B.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
-
C.
Bockscar
Bockscar was the U.S. Army Air Forces B-29 Superfortress bomber that dropped the "Fat Man" nuclear weapon on Nagasaki during World War II.
-
D.
atomic bombing of Nagasaki
The atomic bombing of Nagasaki was the second nuclear attack carried out by the United States against Japan in August 1945, leading to massive civilian casualties and contributing to Japan’s surrender in World War II.
-
E.
Operation Crossroads
Operation Crossroads was a series of U.S. nuclear weapons tests conducted at Bikini Atoll in 1946 to study the effects of atomic bombs on warships and military equipment.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
Target entity: Little Boy Target entity description: Little Boy was the codename for the uranium-based atomic bomb dropped on Hiroshima, Japan, by the United States on August 6, 1945, marking the first use of nuclear weapons in warfare.
-
A.
Fat Man
Fat Man was the plutonium implosion-type nuclear bomb detonated over Nagasaki, Japan, in August 1945, contributing to the end of World War II.
-
B.
Trinity test device
The Trinity test device was the first nuclear explosive ever detonated, a plutonium-based implosion bomb tested by the Manhattan Project in July 1945.
-
C.
Bockscar
Bockscar was the U.S. Army Air Forces B-29 Superfortress bomber that dropped the "Fat Man" nuclear weapon on Nagasaki during World War II.
-
D.
atomic bombing of Nagasaki
The atomic bombing of Nagasaki was the second nuclear attack carried out by the United States against Japan in August 1945, leading to massive civilian casualties and contributing to Japan’s surrender in World War II.
-
E.
Operation Crossroads
Operation Crossroads was a series of U.S. nuclear weapons tests conducted at Bikini Atoll in 1946 to study the effects of atomic bombs on warships and military equipment.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
atomic bomb
ⓘ
nuclear weapon ⓘ uranium-based fission bomb ⓘ |
| approximateYield |
13–18 kilotons of TNT
ⓘ
15 kilotons of TNT ⓘ |
| casualtiesContext | caused massive civilian casualties in Hiroshima ⓘ |
| category |
Nuclear bombs of the United States
ⓘ
World War II weapons of the United States ⓘ |
| cityTargeted | Hiroshima ⓘ |
| codenameOf | uranium-based atomic bomb dropped on Hiroshima ⓘ |
| continentTargeted | Asia ⓘ |
| countryOfOrigin |
United States of America
ⓘ
surface form:
United States
|
| crewCommanderOfDeliveryAircraft | Paul W. Tibbets Jr. ⓘ |
| dateOfUse | 1945-08-06 ⓘ |
| deliveredBy | 509th Composite Group ⓘ |
| deliveryAircraft | Enola Gay ⓘ |
| deliveryMethod | air-dropped bomb ⓘ |
| designType | gun-type fission weapon ⓘ |
| developedBy |
Los Alamos Laboratory
ⓘ
Manhattan Project ⓘ |
| developmentCountry |
United States of America
ⓘ
surface form:
United States
|
| developmentPeriod | World War II ⓘ |
| diameter | approximately 71 centimeters ⓘ |
| droppedOn | Hiroshima ⓘ |
| era | early Cold War precursor ⓘ |
| explosionHeight | approximately 600 meters above Hiroshima ⓘ |
| firstUseContext |
first atomic bomb used in combat
ⓘ
first nuclear weapon used in warfare ⓘ |
| fissileMaterial | uranium-235 ⓘ |
| followedBy | Fat Man ⓘ |
| historicalSignificance |
contributed to Japan's decision to surrender
ⓘ
demonstrated destructive power of nuclear weapons ⓘ triggered global nuclear arms race ⓘ |
| length | approximately 3 meters ⓘ |
| nicknameLanguage | English ⓘ |
| operator | United States Army Air Forces ⓘ |
| opposedBy | some Manhattan Project scientists ⓘ |
| purpose |
to demonstrate U.S. nuclear capability
ⓘ
to force Japanese surrender ⓘ |
| relatedEvent | atomic bombings of Hiroshima and Nagasaki ⓘ |
| relatedOperation | Manhattan Project nuclear tests and development ⓘ |
| targetCountry | Japan ⓘ |
| usedBy | United States Army Air Forces ⓘ |
| usedInConflict | World War II ⓘ |
| usedInTheater | Pacific War ⓘ |
| usedOnDate | 1945-08-06 ⓘ |
| warheadType | fission ⓘ |
| weaponType | strategic bomb ⓘ |
| weight | approximately 4,400 kg ⓘ |
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.
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.
Subject: Little Boy Description of subject: Little Boy was the codename for the uranium-based atomic bomb dropped on Hiroshima, Japan, by the United States on August 6, 1945, marking the first use of nuclear weapons in warfare.
Referenced by (21)
Full triples — surface form annotated when it differs from this entity's canonical label.