Question: when is the last time the us had a draft
[{'answer': 'December 1972', 'provenance': [{'wikipedia_id': '1029446', 'title': 'Conscription in the United States', 'start_paragraph_id': 65, 'start_character': 808, 'end_paragraph_id': 65, 'end_character': 821, 'bleu_score': 1.0, 'section': 'Section::::History.:End of conscription.\n'}]}, {'provenance': [{'wikipedia_id': '1029446', 'title': 'Conscription in the United States', 'start_paragraph_id': 65, 'start_character': 0, 'end_paragraph_id': 65, 'end_character': 1305, 'bleu_score': 0.990970423521577, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7533830068266221948}, 'section': 'Section::::History.:End of conscription.\n'}]}]