Question: What medal did this Eritrean-born American long distance runner who was coached by Bob Larsen win during the 2004 Olympics?
Sentence (from "Meb Keflezighi"): He won the 2009 New York City Marathon on November 1, 2009, and the 2014 Boston Marathon on April 21, 2014, becoming the first American man to win each race since 1982 and 1983, respectively.
Relevant evidence: No