Question: What man, widely considered to be the greatest sprinter of all time, participated in the 2012 Summer Olympics?
Sentence (from "Jamaica at the 2012 Summer Olympics"): Jamaica's participation in London marked its sixteenth appearance as an independent nation, although it had previously competed in four other games (including the 1948 debut in the same host city London) as a British colony, and as part of the West Indies Federation.
Relevant evidence: No