Question: who has won the most gold medals in swimming
[{'answer': 'Michael Phelps', 'provenance': [{'wikipedia_id': '18855244', 'title': 'List of multiple Olympic medalists', 'start_paragraph_id': 2, 'start_character': 17, 'end_paragraph_id': 2, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18855244', 'title': 'List of multiple Olympic medalists', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 270, 'bleu_score': 0.8703737209656041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7196773531234850377}, 'section': 'Section::::Abstract.'}]}]