Question: who has won the most french open titles
[{'answer': 'Rafael Nadal', 'provenance': [{'wikipedia_id': '773239', 'title': "List of French Open men's singles champions", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 12, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '773239', 'title': "List of French Open men's singles champions", 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 832, 'bleu_score': 0.780330579175813, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5046395354863857783}, 'section': 'Section::::Abstract.'}]}]