Manhattan Project sites
E18304
Manhattan Project sites are historically significant locations across the United States associated with the research, development, and testing of the first nuclear weapons during World War II.
All labels observed (8)
How this entity was disambiguated
This entity first appeared as the object of triple T134129 — 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: Manhattan Project sites Context triple: [Trinity test site, New Mexico, category, Manhattan Project sites]
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A.
Manhattan Project National Historical Park (Los Alamos unit)
The Manhattan Project National Historical Park (Los Alamos unit) is a U.S. national historical park site that preserves and interprets key locations associated with the development of the atomic bomb during World War II in Los Alamos, New Mexico.
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B.
Hanford Site, Washington
Hanford Site, Washington is a large decommissioned nuclear production complex along the Columbia River that was central to U.S. plutonium production during and after World War II and is now one of the nation’s most challenging environmental cleanup sites.
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C.
Savannah River Site
Savannah River Site is a U.S. Department of Energy nuclear reservation in South Carolina historically used for producing materials for nuclear weapons and now focused on environmental cleanup and nuclear materials management.
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D.
Manhattan Project
The Manhattan Project was the secret U.S.-led World War II research and development program that produced the first nuclear weapons.
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E.
Los Alamos Laboratory
Los Alamos Laboratory was the secret U.S. research facility in New Mexico where the Manhattan Project developed the first atomic bombs during World War II.
- 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: Manhattan Project sites Target entity description: Manhattan Project sites are historically significant locations across the United States associated with the research, development, and testing of the first nuclear weapons during World War II.
-
A.
Manhattan Project National Historical Park (Los Alamos unit)
The Manhattan Project National Historical Park (Los Alamos unit) is a U.S. national historical park site that preserves and interprets key locations associated with the development of the atomic bomb during World War II in Los Alamos, New Mexico.
-
B.
Hanford Site, Washington
Hanford Site, Washington is a large decommissioned nuclear production complex along the Columbia River that was central to U.S. plutonium production during and after World War II and is now one of the nation’s most challenging environmental cleanup sites.
-
C.
Savannah River Site
Savannah River Site is a U.S. Department of Energy nuclear reservation in South Carolina historically used for producing materials for nuclear weapons and now focused on environmental cleanup and nuclear materials management.
-
D.
Manhattan Project
The Manhattan Project was the secret U.S.-led World War II research and development program that produced the first nuclear weapons.
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E.
Los Alamos Laboratory
Los Alamos Laboratory was the secret U.S. research facility in New Mexico where the Manhattan Project developed the first atomic bombs during World War II.
- F. None of above. chosen
Statements (55)
| Predicate | Object |
|---|---|
| instanceOf |
World War II site category
ⓘ
cultural heritage ensemble ⓘ group of historic sites ⓘ |
| country | United States of America ⓘ |
| hasDesignation |
Manhattan Project National Historical Park (Los Alamos unit)
ⓘ
surface form:
Manhattan Project National Historical Park core sites
|
| hasPart |
Kirtland Air Force Base
ⓘ
surface form:
Albuquerque Army Air Base support facilities
Hanford production reactors ⓘ
surface form:
B Reactor, Hanford
Chicago Pile-1 ⓘ
surface form:
Chicago Pile-1 site
Clinton Engineer Works ⓘ Oak Ridge National Laboratory ⓘ
surface form:
Clinton Laboratories, Oak Ridge
Columbia Radiation Laboratory ⓘ
surface form:
Columbia University Manhattan Project laboratories
Dayton Project facilities ⓘ Fernald Feed Materials Production Center precursor facilities ⓘ Hanford Site, Washington ⓘ
surface form:
Hanford Engineer Works
Hanford Site, Washington ⓘ
surface form:
Hanford, Washington
Harvard University cyclotron laboratory ⓘ Iowa Ordnance Plant ⓘ K-25 Project ⓘ
surface form:
K-25 gaseous diffusion plant
Linde Air Products uranium facilities ⓘ Los Alamos Laboratory ⓘ Manhattan Project National Historical Park (Los Alamos unit) ⓘ
surface form:
Los Alamos Trinity test preparation areas
Los Alamos, New Mexico ⓘ Mallinckrodt Chemical Works, St. Louis ⓘ Manhattan Engineer District headquarters in New York City ⓘ Manhattan Project National Historical Park (Los Alamos unit) ⓘ
surface form:
Manhattan Project National Historical Park – Hanford unit
Manhattan Project National Historical Park (Los Alamos unit) ⓘ
surface form:
Manhattan Project National Historical Park – Los Alamos unit
Oak Ridge History Museum ⓘ
surface form:
Manhattan Project National Historical Park – Oak Ridge unit
Massachusetts Institute of Technology Radiation Laboratory ⓘ Chicago Metallurgical Laboratory ⓘ
surface form:
Metallurgical Laboratory, University of Chicago
Niagara Falls uranium processing plants ⓘ Oak Ridge, Tennessee ⓘ Princeton University theoretical physics group facilities ⓘ Los Alamos Laboratory ⓘ
surface form:
Project Y technical area at Los Alamos
S-50 thermal diffusion plant ⓘ Sandia Base early nuclear weapons assembly facilities ⓘ Manhattan Engineer District of the U.S. Army Corps of Engineers ⓘ
surface form:
Sante Fe office of the Manhattan Engineer District
Hanford Site, Washington ⓘ
surface form:
Site W, Hanford production complex
Site W, Washington, D.C. offices ⓘ Oak Ridge Reservation ⓘ
surface form:
Site X, Oak Ridge production complex
Los Alamos Laboratory ⓘ
surface form:
Site Y, Los Alamos laboratory complex
Hanford Site, Washington ⓘ
surface form:
T Plant, Hanford
Tinian ⓘ
surface form:
Tinian Island B-29 staging facilities
Trinity test site, New Mexico ⓘ
surface form:
Trinity test site, Alamogordo Bombing and Gunnery Range
Radiation Laboratory ⓘ
surface form:
University of California, Berkeley Radiation Laboratory
Weldon Spring Ordnance Works ⓘ Wendover Army Air Field training facilities ⓘ X-10 graphite reactor ⓘ
surface form:
X-10 Graphite Reactor
Y-12 National Security Complex ⓘ
surface form:
Y-12 electromagnetic separation plant
|
| hasTimePeriod | World War II ⓘ |
| hasUse |
nuclear weapons research
ⓘ
plutonium production ⓘ uranium enrichment ⓘ weapons design and testing ⓘ |
| significantEvent |
Trinity test device
ⓘ
surface form:
Trinity nuclear test
development of the first nuclear weapons ⓘ |
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: Manhattan Project sites Description of subject: Manhattan Project sites are historically significant locations across the United States associated with the research, development, and testing of the first nuclear weapons during World War II.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
K-25 site (former gaseous diffusion plant)
this entity surface form:
Manhattan Project legacy facilities
this entity surface form:
Manhattan Project-era Los Alamos
this entity surface form:
Manhattan Project sites in New Mexico
this entity surface form:
Manhattan Project site
this entity surface form:
Washington, D.C. Manhattan Project headquarters
this entity surface form:
Manhattan Project infrastructure