 Complete the following phrase:  Evan Bates born February 23, 1989 is an American ice dancer. With his skating partner, Madison Chock, he is a two-time World medalist silver in 2015, bronze in 2016, a three-time Grand Prix Final silver medalist 201415, 201516, 201920, a two-time Four Continents champion 2019, 2020, and a two time U.S. national champion 