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: "Before becoming the head coach of the Philadelphia Eagles, this person was also the head coach of what team?" whose answer is the Oregon Ducks.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Nick Sirianni predecessor Philadelphia Eagles
Useful Output:

Doc 1: The Philadelphia Eagles confirmed that Brandon Graham will return to practice before the Super Bowl against the Kansas City Chiefs.
Doc 2: First-time head coach Nick Sirianni, 39, has assembled a generally young group with some boom or bust potential, adding risk and intrigue to his
Doc 3: Sirianni's predecessor, former Eagles coach Doug Pederson, also called the offensive plays and so did Chip Kelly. The last offensive
Doc 4: Sirianni secured his first Super Bowl victory at 43 years old. When Andy Reid was the same age, he had yet to win a Vince Lombardi Trophy as a head coach.
Doc 5: PHILADELPHIA — “See this guy?” Nick Sirianni asked me as he exited  Sirianni's predecessor, Doug Pederson. Like Andy Reid, Sirianni