You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "Who is the athletic director of the university that used to have Barry Switzer as a head coach?" whose answer is Joe Castiglione.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Barry Switzer coaching history
Useful Output:

Doc 1: He was 157–29–4 as head coach at Oklahoma between 1973 and 1988. He won national championships in 1974, 1975 and 1985, and just missed in
Doc 2: As head coach of the Sooners, Switzer orchestrated an era of unprecedented dominance. His teams were known for their potent offenses, aggressive
Doc 3: After becoming the head coach of the Oklahoma Sooners in 1973, Switzer led the team to: National titles in 1974, 1975 and 1985. 12 Big 8 Championships. Eight
Doc 4: He resigned as coach of the Cowboys in 1998, having posted a career NFL coaching record of 45–26. Football News named Switzer Coach of the Year
Doc 5: In his sixteen years as head coach of the Sooners, Switzer had a 157–29–4 record and won twelve Big Eight championships and three national