Question: when did us women's soccer win world cup
[{'answer': '1991', 'provenance': [{'wikipedia_id': '647757', 'title': "United States women's national soccer team", 'start_paragraph_id': 1, 'start_character': 262, 'end_paragraph_id': 1, 'end_character': 266, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '1999', 'provenance': [{'wikipedia_id': '647757', 'title': "United States women's national soccer team", 'start_paragraph_id': 1, 'start_character': 411, 'end_paragraph_id': 1, 'end_character': 415, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': '2015', 'provenance': [{'wikipedia_id': '647757', 'title': "United States women's national soccer team", 'start_paragraph_id': 1, 'start_character': 597, 'end_paragraph_id': 1, 'end_character': 601, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]