Cannikin
E596172
Cannikin was a 1971 underground U.S. nuclear test on Amchitka Island in Alaska, notable for being one of the largest underground detonations ever conducted by the United States.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Cannikin canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T6491310 — 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: Cannikin Context triple: [Amchitka Island, nuclearTest, Cannikin]
-
A.
Novacane
"Novacane" is a song by American musician Beck, featured on his acclaimed 1996 album *Odelay*, blending alternative rock with experimental and sample-heavy production.
-
B.
Kaiten
Kaiten was a Japanese warship that took part in the late-19th-century Boshin War naval engagements, including the Battle of Hakodate.
-
C.
Kenabeek
Kenabeek is a small rural community located within Ontario’s Timiskaming District in Canada.
-
D.
Kerzers
Kerzers is a municipality in the canton of Fribourg in western Switzerland, known for its bilingual character and proximity to the Papiliorama butterfly and tropical gardens.
-
E.
Cupan
Cupan is a subgroup of Southern Uto-Aztecan languages that includes several closely related Indigenous languages once spoken in Southern California.
- 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: Cannikin Target entity description: Cannikin was a 1971 underground U.S. nuclear test on Amchitka Island in Alaska, notable for being one of the largest underground detonations ever conducted by the United States.
-
A.
Novacane
"Novacane" is a song by American musician Beck, featured on his acclaimed 1996 album *Odelay*, blending alternative rock with experimental and sample-heavy production.
-
B.
Kaiten
Kaiten was a Japanese warship that took part in the late-19th-century Boshin War naval engagements, including the Battle of Hakodate.
-
C.
Kenabeek
Kenabeek is a small rural community located within Ontario’s Timiskaming District in Canada.
-
D.
Kerzers
Kerzers is a municipality in the canton of Fribourg in western Switzerland, known for its bilingual character and proximity to the Papiliorama butterfly and tropical gardens.
-
E.
Cupan
Cupan is a subgroup of Southern Uto-Aztecan languages that includes several closely related Indigenous languages once spoken in Southern California.
- F. None of above. chosen
Statements (44)
| Predicate | Object |
|---|---|
| instanceOf |
Cold War military operation
ⓘ
nuclear weapons test ⓘ |
| associatedProgram | Safeguard ABM system NERFINISHED ⓘ |
| codeName | Cannikin NERFINISHED ⓘ |
| continent | North America ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| craterDepth | approximately 60 meters ⓘ |
| craterDiameter | approximately 1.5 kilometers ⓘ |
| date | 1971-11-06 ⓘ |
| depthOfBurial | approximately 1,790 meters ⓘ |
| devicePlacement | vertical shaft ⓘ |
| environmentalConcerns |
potential radioactive contamination
ⓘ
risk of earthquakes and tsunamis ⓘ |
| era | Cold War ⓘ |
| hasAftereffects | formation of a subsidence crater ⓘ |
| hasLanguageOfWorkOrName | English ⓘ |
| isFollowedBy | moratorium on further nuclear testing at Amchitka ⓘ |
| isLocatedInProtectedArea | true ⓘ |
| isOnIsland | true ⓘ |
| isPartOf | United States nuclear testing program NERFINISHED ⓘ |
| location |
Alaska
NERFINISHED
ⓘ
Aleutian Islands NERFINISHED ⓘ Amchitka Island NERFINISHED ⓘ |
| notableFor | being one of the largest underground nuclear tests conducted by the United States ⓘ |
| operator | United States Atomic Energy Commission NERFINISHED ⓘ |
| partOfConflict | Cold War nuclear arms race NERFINISHED ⓘ |
| politicalControversy | concerns over seismic and ecological impact ⓘ |
| protests | opposed by environmental and peace groups ⓘ |
| purpose | proof test of a thermonuclear warhead design ⓘ |
| region | North Pacific Ocean NERFINISHED ⓘ |
| relatedEvent | early Greenpeace anti-nuclear campaigns ⓘ |
| relatedOrganization | Greenpeace NERFINISHED ⓘ |
| relatedTo | U.S.–Soviet strategic arms competition NERFINISHED ⓘ |
| safetyMeasures | extensive geological and seismic studies prior to detonation ⓘ |
| seismicMagnitude | approximately 7.0 ⓘ |
| testingAuthority |
United States Atomic Energy Commission
NERFINISHED
ⓘ
United States Department of Defense NERFINISHED ⓘ |
| testSeries | Operation Grommet NERFINISHED ⓘ |
| testSite | Amchitka test site NERFINISHED ⓘ |
| testType | underground shaft test ⓘ |
| underground | true ⓘ |
| warheadTested | Spartan anti-ballistic missile warhead ⓘ |
| year | 1971 ⓘ |
| yield | approximately 5 megatons 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: Cannikin Description of subject: Cannikin was a 1971 underground U.S. nuclear test on Amchitka Island in Alaska, notable for being one of the largest underground detonations ever conducted by the United States.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.