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: "What NFL coaching position doboth Buddy Ryan and Rob Ryan have in common?" whose answer is defensive coordinator.
Each document should contain about 30 words, and these documents should contain useful information.

Query: common NFL coaching position for Buddy Ryan and Rob Ryan
Useful Output:

Doc 1: Rex currently coaches the Bills and Rob is his assistant. Buddy Ryan coached in the NFL for 26 seasons, the final two in Arizona. He had
Doc 2: Buddy Ryan was the Oilers defensive coordinator in 1993. There were several reasons for his short stay in
Doc 3: Ryan got his start in the NFL coaching under his father, Buddy Ryan as the defensive backs coach with the Arizona Cardinals from 1994-95. He
Doc 4: Both have extensive NFL experience. Rex has been head coach of the Bills and Jets; he's now an ESPN analyst. Rob just joined the Ravens' staff,
Doc 5: Rex Ryan is the head coach of the Bills, with Rob serving as his assistant head coach/defense. What's more, virtually every team in the league