Question: when did the mob lose control of las vegas
[{'answer': '1966', 'provenance': [{'wikipedia_id': '2087269', 'title': 'History of Las Vegas', 'start_paragraph_id': 3, 'start_character': 632, 'end_paragraph_id': 3, 'end_character': 636, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '2087269', 'title': 'History of Las Vegas', 'start_paragraph_id': 45, 'start_character': 0, 'end_paragraph_id': 45, 'end_character': 773, 'bleu_score': 0.949767379298415, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1789829284865088250}, 'section': 'Section::::1956–1969: the beginning of modern Las Vegas.:Howard Hughes.\n'}]}]