Question: What's the birth year of the athlete that Niels do Vos used as an example for why athletes should be banned for using banned substances?
Sentence (from "Justin Gatlin"): He is the 2004 Olympic champion in the 100 metres, the 2005 and 2017 World champion in the same event, and the 2005 World champion in the 200 metres.
Relevant evidence: No