Question: what is the percent alcohol of 100 proof whiskey
[{'answer': '50 %', 'provenance': [{'wikipedia_id': '96049', 'title': 'Alcohol proof', 'start_paragraph_id': 15, 'start_character': 376, 'end_paragraph_id': 15, 'end_character': 387, 'bleu_score': 1.0, 'section': 'Section::::Governmental regulation.:United States.\n'}]}, {'provenance': [{'wikipedia_id': '96049', 'title': 'Alcohol proof', 'start_paragraph_id': 7, 'start_character': 0, 'end_paragraph_id': 7, 'end_character': 175, 'bleu_score': 0.8743414417652071, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9189602882226018777}, 'section': 'Section::::History.\n'}]}]