Cactus Dome
E290405
Cactus Dome is a concrete-covered nuclear waste containment structure on Runit Island in Enewetak Atoll, built by the United States to store radioactive debris from Cold War nuclear tests.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Cactus Dome canonical | 3 |
| Runit Cactus Dome | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T2710384 — 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: Cactus Dome Context triple: [Enewetak Atoll, RunitDomeAlsoKnownAs, Cactus Dome]
-
A.
Sunsphere
The Sunsphere is a 266-foot-tall, gold-glass observation tower built as the symbol of the 1982 World's Fair in Knoxville, Tennessee.
-
B.
Arc Dome
Arc Dome is a prominent mountain summit in central Nevada known for its remote wilderness setting and extensive hiking opportunities.
-
C.
Walter Pyramid
Walter Pyramid is a distinctive blue, pyramid-shaped indoor arena on the campus of California State University, Long Beach, best known as a venue for college basketball and volleyball.
-
D.
Platinum Dunes
Platinum Dunes is an American film production company, co-founded by Michael Bay, known for producing horror and thriller films such as remakes of classic franchises and original hits like "A Quiet Place."
-
E.
Sentinel Dome area
The Sentinel Dome area is a scenic high-elevation viewpoint in Yosemite National Park known for its panoramic vistas of iconic landmarks like Half Dome, Yosemite Valley, and the High Sierra peaks.
- 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: Cactus Dome Target entity description: Cactus Dome is a concrete-covered nuclear waste containment structure on Runit Island in Enewetak Atoll, built by the United States to store radioactive debris from Cold War nuclear tests.
-
A.
Sunsphere
The Sunsphere is a 266-foot-tall, gold-glass observation tower built as the symbol of the 1982 World's Fair in Knoxville, Tennessee.
-
B.
Arc Dome
Arc Dome is a prominent mountain summit in central Nevada known for its remote wilderness setting and extensive hiking opportunities.
-
C.
Walter Pyramid
Walter Pyramid is a distinctive blue, pyramid-shaped indoor arena on the campus of California State University, Long Beach, best known as a venue for college basketball and volleyball.
-
D.
Platinum Dunes
Platinum Dunes is an American film production company, co-founded by Michael Bay, known for producing horror and thriller films such as remakes of classic franchises and original hits like "A Quiet Place."
-
E.
Sentinel Dome area
The Sentinel Dome area is a scenic high-elevation viewpoint in Yosemite National Park known for its panoramic vistas of iconic landmarks like Half Dome, Yosemite Valley, and the High Sierra peaks.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
nuclear waste containment structure
ⓘ
radioactive waste storage site ⓘ |
| alsoKnownAs |
Runit Dome
ⓘ
the Tomb ⓘ
surface form:
The Tomb
|
| constructedBy |
United States of America
ⓘ
surface form:
United States
United States Armed Forces ⓘ
surface form:
United States military
|
| containsWasteFrom |
Bikini Atoll
ⓘ
surface form:
Bikini Atoll nuclear tests
Enewetak Atoll nuclear tests ⓘ United States nuclear weapons testing ⓘ
surface form:
United States nuclear weapons testing program
|
| coordinateLocation | 11.552°N 162.347°E ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| diameter | approximately 115 meters ⓘ |
| endDate | 1980 ⓘ |
| environmentalIssue |
radioactive contamination
ⓘ
vulnerability to storms and erosion ⓘ |
| hasPart |
concrete dome
ⓘ
contaminated soil ⓘ plutonium-contaminated material ⓘ radioactive debris ⓘ |
| height | approximately 7.6 meters ⓘ |
| heritageStatus | remnant of Cold War nuclear testing ⓘ |
| inception | 1980 ⓘ |
| locatedInFormerlyUsedDefenseSite |
Pacific Proving Grounds
ⓘ
surface form:
Enewetak Proving Ground
|
| locatedInTheAdministrativeTerritorialEntity |
Marshall Islands
ⓘ
surface form:
Republic of the Marshall Islands
|
| locatedInTheBodyOfWater |
Pacific Ocean
ⓘ
Ralik Chain ⓘ |
| locatedOnSiteOf |
Cactus nuclear test crater
ⓘ
surface form:
Cactus test crater
|
| location |
Enewetak Atoll
ⓘ
Marshall Islands ⓘ Runit Island ⓘ |
| materialUsed | concrete ⓘ |
| namedAfter |
Operation Greenhouse
ⓘ
surface form:
Cactus nuclear test
|
| numberOfConcretePanels | 357 ⓘ |
| operator |
Department of Defense
ⓘ
surface form:
United States Department of Defense
U.S. Department of Energy ⓘ
surface form:
United States Department of Energy
|
| ownedBy |
United States of America
ⓘ
surface form:
United States
|
| partOf |
Enewetak Atoll
ⓘ
surface form:
Enewetak nuclear test site
|
| purpose |
containment of radioactive waste
ⓘ
storage of nuclear test debris ⓘ |
| risk |
potential leakage of radioactive material
ⓘ
structural degradation due to climate and sea-level rise ⓘ |
| significantEvent |
Cold War nuclear testing cleanup
ⓘ
Enewetak Atoll radiological cleanup project ⓘ |
| startDate | 1977 ⓘ |
| subjectOf |
United Nations reports on nuclear legacy in the Marshall Islands
ⓘ
environmental impact studies ⓘ |
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: Cactus Dome Description of subject: Cactus Dome is a concrete-covered nuclear waste containment structure on Runit Island in Enewetak Atoll, built by the United States to store radioactive debris from Cold War nuclear tests.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Runit Cactus Dome