Question: The 2013 Oklahoma Sooners football team was coached by which coach, who retired in 2017?
Sentence (from "Oklahoma Sooners football"): In addition, the school has had 23 members (five coaches and 18 players) inducted into the College Football Hall of Fame and holds the record for the longest winning streak in Division I history with 47 straight victories, a record that stands to this day.
Relevant evidence: No