Question: when did the last american revolution veteran died
[{'answer': '1869', 'provenance': [{'wikipedia_id': '378367', 'title': 'Last surviving United States war veterans', 'start_paragraph_id': 13, 'start_character': 43, 'end_paragraph_id': 13, 'end_character': 47, 'bleu_score': 1.0, 'section': 'Section::::18th Century.:American Revolutionary War (1775–1783).\n'}]}]