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: "The 2006 FIFA World Cup Final featured a headbutt of which future manager of Chennaiyin?" whose answer is Marco Materazzi.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Marco Materazzi manager Chennaiyin
Useful Output:

Doc 1: This is the profile site of the manager Marco Materazzi  Marco Materazzi. Indian Super League Champion 1 · Without Club Last position: Manager Chennaiyin FC.
Doc 2: Chennai, March 6 2017 – Chennaiyin FC and Marco Materazzi have today parted company by mutual consent. Italian Materazzi was the head coach
Doc 3: ISL franchise Chennaiyin FC today parted ways with their World Cup winning Italian coach Marco Materazzi.
Doc 4: The former Inter Milan star joined Indian club Chennaiyin FC earlier this month as a player-manager but his primary aim is to coach.
Doc 5: Marco Materazzi. Indian Super League Champion 1 · Without Club Last position: Manager Chennaiyin FC. Marco Materazzi. Getty Images. +.