Question: who was the first u.s. president to propose a national health insurance plan
[{'answer': 'Harry Truman', 'provenance': [{'wikipedia_id': '23390653', 'title': 'History of health care reform in the United States', 'start_paragraph_id': 16, 'start_character': 35, 'end_paragraph_id': 16, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::Federal health care proposals.:1930s–1950s.\n'}]}, {'provenance': [{'wikipedia_id': '23390653', 'title': 'History of health care reform in the United States', 'start_paragraph_id': 16, 'start_character': 0, 'end_paragraph_id': 16, 'end_character': 525, 'bleu_score': 0.9776501033621461, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4322042694733195542}, 'section': 'Section::::Federal health care proposals.:1930s–1950s.\n'}]}]