Question: who won the us open men’s and women’s singles in 2017
[{'answer': 'Rafael Nadal', 'provenance': [{'wikipedia_id': '51884449', 'title': '2017 US Open (tennis)', 'start_paragraph_id': 3, 'start_character': 44, 'end_paragraph_id': 3, 'end_character': 56, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Sloane Stephens', 'provenance': [{'wikipedia_id': '51884449', 'title': '2017 US Open (tennis)', 'start_paragraph_id': 3, 'start_character': 148, 'end_paragraph_id': 3, 'end_character': 163, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '51884449', 'title': '2017 US Open (tennis)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 199, 'bleu_score': 0.9364250605898111, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 18088467721074164081}, 'section': 'Section::::Abstract.'}]}]