Question: Ryan Held, is an American freestyle swimmer who specializes in the sprint events, in the final he split 47.73 on the third leg, winning the gold medal together with Caeleb Dressel, Nathan Adrian and who, which American former competitive swimmer and the most decorated Olympian of all time, with a total of 28 medals?
{'answer': 'Michael Phelps', 'supporting_facts': [['Ryan Held', 3], ['Michael Phelps', 0]]}