Question: who was the oldest living civil war veteran
[{'answer': 'Albert Henry Woolson', 'provenance': [{'wikipedia_id': '378367', 'title': 'Last surviving United States war veterans', 'start_paragraph_id': 44, 'start_character': 12, 'end_paragraph_id': 44, 'end_character': 32, 'bleu_score': 1.0, 'section': 'Section::::19th Century.:American Civil War (1861–1865).\n'}]}]