Question: The 2015 Oklahoma Sooners football team represented the University of Oklahoma in the 2015 NCAA Division I FBS football season, the 121st season of Sooner football, the team was led by which two-time Walter Camp Coach of the Year Award winner, who?
Sentence (from "Bob Stoops"): He is the former head football coach at the University of Oklahoma, a position he held from 1999 until he announced his retirement June 7, 2017.
Relevant evidence: No