Item
{'<entity_0>': 'Operation Greenhouse', '<entity_1>': 'Item', '<entity_2>': 'Enewetak Atoll', '<entity_3>': 'nuclear test'}
[['Item', 'location', 'Enewetak Atoll'], ['Item', 'part of', 'Operation Greenhouse'], ['Item', 'description', 'nuclear test']]
<entity_1> was an American <entity_3> conducted on May 25, 1951, as part of <entity_0> at the Pacific Proving Ground, specifically on the island of Engebi in the <entity_2> in the Central Pacific Ocean. Even as late as 1954, no boosted weapon had entered into the nuclear-weapons stockpile, and the only use for the <entity_1> <entity_3> had been for its research results.
['extended play', 'nuclear weapons test', 'television drama', 'newspaper']