Operation Plumbbob
E414474
Operation Plumbbob was a 1957 series of U.S. atmospheric nuclear tests conducted at the Nevada Test Site, notable for its large number of detonations and extensive military and civil defense experiments.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Operation Plumbbob canonical | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T4080574 — 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: Operation Plumbbob Context triple: [United States nuclear weapons testing, hasPart, Operation Plumbbob]
-
A.
Operation Teapot
Operation Teapot was a 1955 series of U.S. atmospheric nuclear tests at the Nevada Test Site conducted to study weapon effects, improve nuclear designs, and assess military and civil defense responses.
-
B.
Operation Greenhouse
Operation Greenhouse was a series of early Cold War U.S. nuclear tests conducted in 1951 at Enewetak Atoll to advance thermonuclear weapon design and improve bomb efficiency.
-
C.
Operation Hardtack I
Operation Hardtack I was a 1958 U.S. series of high-yield nuclear tests in the Pacific, notable for advancing thermonuclear weapons development during the Cold War.
-
D.
Operation Hardtack II
Operation Hardtack II was a 1958 series of U.S. nuclear tests conducted primarily at the Nevada Test Site to evaluate a range of warhead designs and effects during the Cold War.
-
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.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Operation Plumbbob Target entity description: Operation Plumbbob was a 1957 series of U.S. atmospheric nuclear tests conducted at the Nevada Test Site, notable for its large number of detonations and extensive military and civil defense experiments.
-
A.
Operation Teapot
Operation Teapot was a 1955 series of U.S. atmospheric nuclear tests at the Nevada Test Site conducted to study weapon effects, improve nuclear designs, and assess military and civil defense responses.
-
B.
Operation Greenhouse
Operation Greenhouse was a series of early Cold War U.S. nuclear tests conducted in 1951 at Enewetak Atoll to advance thermonuclear weapon design and improve bomb efficiency.
-
C.
Operation Hardtack I
Operation Hardtack I was a 1958 U.S. series of high-yield nuclear tests in the Pacific, notable for advancing thermonuclear weapons development during the Cold War.
-
D.
Operation Hardtack II
Operation Hardtack II was a 1958 series of U.S. nuclear tests conducted primarily at the Nevada Test Site to evaluate a range of warhead designs and effects during the Cold War.
-
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 (47)
| Predicate | Object |
|---|---|
| instanceOf |
United States military operation
ⓘ
nuclear test series ⓘ |
| casualties | exposed thousands of military personnel to nuclear test radiation ⓘ |
| codename | Plumbbob ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| endDate | 1957-10-07 ⓘ |
| feature |
included blast and thermal effects studies on buildings and equipment
ⓘ
included civil defense structure survivability tests ⓘ included extensive biomedical experiments ⓘ included the first fully contained underground nuclear test by the United States ⓘ included troop maneuver exercises near ground zero ⓘ |
| followedBy | Operation Hardtack I ⓘ |
| healthImpact | associated with increased long-term cancer risk among participants ⓘ |
| historicalSignificance |
contributed data used in U.S. nuclear weapons design and effects modeling
ⓘ
one of the largest and most controversial U.S. nuclear test series ⓘ |
| involved |
United States Air Force
ⓘ
United States Army ⓘ United States Marine Corps ⓘ United States Navy ⓘ |
| location |
Nevada
ⓘ
United States of America ⓘ
surface form:
United States
|
| maximumYield | 74 kilotons of TNT ⓘ |
| notableTest |
Shot Hood
ⓘ
Shot Pascal-A ⓘ Shot Pascal-B ⓘ Shot Rainier ⓘ Shot Smoky ⓘ |
| numberOfDetonations | 29 ⓘ |
| numberOfTests | 29 ⓘ |
| operator |
United States Atomic Energy Commission
ⓘ
Department of Defense ⓘ
surface form:
United States Department of Defense
|
| partOf | United States nuclear weapons testing program NERFINISHED ⓘ |
| precededBy | Operation Redwing ⓘ |
| purpose |
civil defense research
ⓘ
military tactics evaluation ⓘ weapons development ⓘ weapons effects research ⓘ |
| startDate | 1957-05-28 ⓘ |
| testEnvironment |
atmosphere
ⓘ
underground ⓘ |
| testSite | Nevada Test Site NERFINISHED ⓘ |
| testType |
atmospheric nuclear test
ⓘ
balloon shot ⓘ cratering test ⓘ tower shot ⓘ underground shaft test ⓘ |
| timePeriod | 1957 ⓘ |
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: Operation Plumbbob Description of subject: Operation Plumbbob was a 1957 series of U.S. atmospheric nuclear tests conducted at the Nevada Test Site, notable for its large number of detonations and extensive military and civil defense experiments.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.