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        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Operation Sandstone was a series of nuclear weapon tests in 1948. It was the third series of American tests, following Trinity in 1945 and Crossroads in 1946, and preceding Ranger. Like the Crossroads tests, the Sandstone tests were carried out at the Pacific Proving Grounds, although at Enewetak Atoll rather than Bikini Atoll. They differed from Crossroads in that they were conducted by the Atomic Energy Commission, with the armed forces having only a supporting role." ] ,
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          "http://dbpedia.org/resource/List_of_nuclear_weapons_tests" ] ,
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