Question: when did the draft end in the us
[{'answer': '1972', 'provenance': [{'wikipedia_id': '1029446', 'title': 'Conscription in the United States', 'start_paragraph_id': 49, 'start_character': 1066, 'end_paragraph_id': 49, 'end_character': 1070, 'bleu_score': 1.0, 'section': 'Section::::History.:Cold War.\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': 8415234411621350110}, 'section': 'Section::::History.:End of conscription.\n'}]}]