Question: who won the us women's open golf tournament
[{'answer': 'Park Sung - hyun', 'provenance': [{'wikipedia_id': '52527131', 'title': "2017 U.S. Women's Open Golf Championship", 'start_paragraph_id': 25, 'start_character': 55, 'end_paragraph_id': 25, 'end_character': 71, 'bleu_score': 1.0, 'section': 'Section::::Qualifying and field.:Exempt from qualifying.\n'}]}]