Question: What medal did this Eritrean-born American long distance runner who was coached by Bob Larsen win during the 2004 Olympics?
Sentence (from "Bob Larsen"): His most notable athlete is Mebrahtom Keflezighi, the 2004 Olympic Silver medalist in the Marathon, an accomplishment that ended a 20-year drought in United States distance running medals at the Olympic level (28 years for male athletes).
Relevant evidence: Yes