Question: when did the military stop putting cigarettes in rations
[{'answer': '1975', 'provenance': [{'wikipedia_id': '28178419', 'title': 'Smoking in the United States military', 'start_paragraph_id': 2, 'start_character': 51, 'end_paragraph_id': 2, 'end_character': 55, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '28178419', 'title': 'Smoking in the United States military', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 1771, 'bleu_score': 0.9316200695624821, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14618331778910454344}, 'section': 'Section::::Smoking in the US military from 1917 to 1975.\n'}]}]