Question: when's the last time tiger woods won the us open
[{'answer': '2008', 'provenance': [{'wikipedia_id': '11570261', 'title': 'List of career achievements by Tiger Woods', 'start_paragraph_id': 176, 'start_character': 308, 'end_paragraph_id': 176, 'end_character': 312, 'bleu_score': 1.0, 'section': 'Section::::Reign as World No. 1 Male Golfer.\n'}]}]