Question: How many medals does an American former competitive swimmer and the most decorated Olympian of all time own, he also  had an American swimming coach who served as the head coach for the Michigan Wolverines swimming and diving team?
Sentence (from "Michael Phelps"): At the 2012 Summer Olympics in London, Phelps won four gold and two silver medals, and at the 2016 Summer Olympics in Rio de Janeiro, he won five gold medals and one silver.
Relevant evidence: No