Question: what olympic athlete has won the most medals
[{'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.'}]}, {'answer': 'Marit Bjørgen', 'provenance': [{'wikipedia_id': '18855244', 'title': 'List of multiple Olympic medalists', 'start_paragraph_id': 3, 'start_character': 30, 'end_paragraph_id': 3, 'end_character': 43, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'American swimmer Michael Phelps', 'provenance': [{'wikipedia_id': '18855244', 'title': 'List of multiple Olympic medalists', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18855244', 'title': 'List of multiple Olympic medalists', 'section': 'Section::::Abstract.', 'start_paragraph_id': 2, 'end_paragraph_id': 2, 'meta': {'evidence_span': ['American swimmer Michael Phelps is the most decorated Olympian,', 'American swimmer Michael Phelps is the most decorated Olympian,', 'American swimmer Michael Phelps is the most decorated Olympian, having won 28 medals in both']}}]}]