Question: who won the french open men's single title in 2017
[{'answer': 'Rafael Nadal', 'provenance': [{'wikipedia_id': '53849611', 'title': "2017 French Open – Men's Singles", 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '53849611', 'title': "2017 French Open – Men's Singles", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 345, 'bleu_score': 0.5876588981375941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16460925216962975481}, 'section': 'Section::::Abstract.'}]}]