Question: The third season of "American Ninja Warrior" began airing on which date, at a chance at becoming the first American to conquer the course and win a $500,000 endorsement deal with K-Swiss?
Sentence (from "American Ninja Warrior (season 3)"): The third season of "American Ninja Warrior" began airing on July 31, 2011, on G4.
Relevant evidence: Yes