Fat Man
E13442
Fat Man was the plutonium implosion-type nuclear bomb detonated over Nagasaki, Japan, in August 1945, contributing to the end of World War II.
All labels observed (6)
| Label | Occurrences |
|---|---|
| Fat Man canonical | 17 |
| Fat Man atomic bomb | 6 |
| Fat Man nuclear bomb | 3 |
| Fat Man bomb design | 1 |
| Fat Man nuclear weapon | 1 |
| Fat Man–type implosion device | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T57154 — 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: Fat Man Context triple: [Los Alamos Laboratory, developed, Fat Man]
-
A.
D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
-
B.
Genbaku Dome
Genbaku Dome, also known as the Hiroshima Peace Memorial, is the preserved ruin of a building near the hypocenter of the 1945 atomic blast and now serves as a UNESCO World Heritage Site symbolizing the horrors of nuclear war and the hope for peace.
-
C.
K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
-
D.
K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
-
E.
Matsubara
Matsubara is a suburban city in Japan’s Kansai region, located within Osaka Prefecture and forming part of the Osaka metropolitan area.
- 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: Fat Man Target entity description: Fat Man was the plutonium implosion-type nuclear bomb detonated over Nagasaki, Japan, in August 1945, contributing to the end of World War II.
-
A.
D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
-
B.
Genbaku Dome
Genbaku Dome, also known as the Hiroshima Peace Memorial, is the preserved ruin of a building near the hypocenter of the 1945 atomic blast and now serves as a UNESCO World Heritage Site symbolizing the horrors of nuclear war and the hope for peace.
-
C.
K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
-
D.
K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
-
E.
Matsubara
Matsubara is a suburban city in Japan’s Kansai region, located within Osaka Prefecture and forming part of the Osaka metropolitan area.
- F. None of above. chosen
Statements (47)
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: Fat Man Description of subject: Fat Man was the plutonium implosion-type nuclear bomb detonated over Nagasaki, Japan, in August 1945, contributing to the end of World War II.
Referenced by (29)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
Hanford Site, Washington
linked to: Fat Man
subject linked to:
MED
linked to: Fat Man
linked to: Fat Man
linked to: Fat Man
linked to: Fat Man
linked to: Fat Man
subject linked to:
Hanford production reactors
linked to: Fat Man
linked to: Fat Man
linked to: Fat Man
linked to: Fat Man
linked to: Fat Man
linked to: Fat Man