Sedan test
E410914
The Sedan test was a 1962 underground nuclear explosion at the Nevada Test Site conducted as part of the Plowshare Program to explore the use of nuclear devices for large-scale earthmoving and excavation.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Sedan test canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4080602 — 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: Sedan test Context triple: [United States nuclear weapons testing, notableEvent, Sedan test]
-
A.
Sedan
Sedan is a town in northeastern France best known as the site of major military engagements, including pivotal battles in both the Franco-Prussian War and World War II.
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B.
SE-D
SE-D is the ISO 3166-2 regional code assigned to Dalarna County in Sweden.
-
C.
Man Vehicle Laboratory
Man Vehicle Laboratory is an MIT research lab focused on human factors, human–machine interaction, and human performance in aerospace and other complex vehicle systems.
-
D.
Vehicle HAL
Vehicle HAL is an abstraction layer in Android Automotive OS that standardizes access to a car’s hardware and vehicle-specific data for higher-level system components and apps.
-
E.
SEDI
SEDI is the Executive Secretariat for Integral Development, a specialized body of the Organization of American States that promotes inclusive and sustainable development across member countries.
- 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: Sedan test Target entity description: The Sedan test was a 1962 underground nuclear explosion at the Nevada Test Site conducted as part of the Plowshare Program to explore the use of nuclear devices for large-scale earthmoving and excavation.
-
A.
Sedan
Sedan is a town in northeastern France best known as the site of major military engagements, including pivotal battles in both the Franco-Prussian War and World War II.
-
B.
SE-D
SE-D is the ISO 3166-2 regional code assigned to Dalarna County in Sweden.
-
C.
Man Vehicle Laboratory
Man Vehicle Laboratory is an MIT research lab focused on human factors, human–machine interaction, and human performance in aerospace and other complex vehicle systems.
-
D.
Vehicle HAL
Vehicle HAL is an abstraction layer in Android Automotive OS that standardizes access to a car’s hardware and vehicle-specific data for higher-level system components and apps.
-
E.
SEDI
SEDI is the Executive Secretariat for Integral Development, a specialized body of the Organization of American States that promotes inclusive and sustainable development across member countries.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
event
ⓘ
nuclear explosion ⓘ underground nuclear test ⓘ |
| aftermath |
contributed data used in later assessments of nuclear test fallout
ⓘ
influenced public and policy views on non-military uses of nuclear explosives ⓘ |
| associatedConcept |
nuclear cratering
ⓘ
nuclear excavation ⓘ peaceful nuclear explosions ⓘ |
| conductedBy |
Lawrence Livermore National Laboratory
ⓘ
surface form:
Lawrence Radiation Laboratory
|
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| countrySubdivision |
Nevada
ⓘ
surface form:
U.S. state of Nevada
|
| craterDepth | about 100 meters ⓘ |
| craterDiameter | about 390 meters ⓘ |
| craterVolume | about 12 million tons of displaced earth ⓘ |
| date | 1962-07-06 ⓘ |
| depthOfBurst | 194 meters ⓘ |
| deviceType | thermonuclear device ⓘ |
| falloutImpact |
contributed to off-site radiation exposure in the United States
ⓘ
produced significant radioactive fallout ⓘ |
| legacy |
demonstrated technical feasibility of nuclear excavation
ⓘ
raised environmental and health concerns about peaceful nuclear explosions ⓘ |
| location |
Area 10, Yucca Flat
NERFINISHED
ⓘ
Nevada Test Site NERFINISHED ⓘ |
| notableFeature |
created one of the largest man-made craters in the United States
ⓘ
most powerful Plowshare cratering test in the United States ⓘ |
| operator | United States Atomic Energy Commission ⓘ |
| partOf |
Operation Plowshare
ⓘ
Operation Plowshare ⓘ
surface form:
Plowshare Program
|
| programGoal | evaluate nuclear excavation for canals and harbors ⓘ |
| purpose |
excavation research
ⓘ
large-scale earthmoving ⓘ peaceful nuclear explosion ⓘ |
| region | Nevada ⓘ |
| regulatoryContext |
United States nuclear weapons testing
ⓘ
surface form:
Cold War nuclear testing program of the United States
|
| safetyConcern | high levels of airborne radioactivity released ⓘ |
| siteStatus | crater remains a tourist observation point on controlled tours ⓘ |
| testGeometry | single nuclear device in vertical shaft ⓘ |
| testSeries | Operation Storax ⓘ |
| testType |
cratering experiment
ⓘ
underground shaft detonation ⓘ |
| year | 1962 ⓘ |
| yield | 104 kilotons of TNT ⓘ |
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: Sedan test Description of subject: The Sedan test was a 1962 underground nuclear explosion at the Nevada Test Site conducted as part of the Plowshare Program to explore the use of nuclear devices for large-scale earthmoving and excavation.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.