Question: when was the last time the us had a military draft
[{'answer': '1973', 'provenance': [{'wikipedia_id': '1029446', 'title': 'Conscription in the United States', 'start_paragraph_id': 1, 'start_character': 461, 'end_paragraph_id': 1, 'end_character': 465, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1029446', 'title': 'Conscription in the United States', 'start_paragraph_id': 1, 'start_character': 20, 'end_paragraph_id': 1, 'end_character': 1182, 'bleu_score': 0.9501762152199901, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16274859934877018639}, 'section': 'Section::::Abstract.'}]}]