Question: where have nuclear explosions occurred the most in the us
[{'answer': 'the Nevada Test Site', 'provenance': [{'wikipedia_id': '31650532', 'title': "List of United States' nuclear weapons tests", 'start_paragraph_id': 1, 'start_character': 280, 'end_paragraph_id': 1, 'end_character': 300, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '31650532', 'title': "List of United States' nuclear weapons tests", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 601, 'bleu_score': 0.979896933041101, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14683792978084641311}, 'section': 'Section::::Abstract.'}]}]