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 German professional footballer who is the client of Roman Grill?" whose answer is Piotr Trochowski.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Roman Grill client German footballer
Useful Output:

Doc 1: Having started his football career with Bayern Munich and then moving on to coaching, Roman Grill decided to start acta7, an agency that helps
Doc 2: In 1997, after his active career, Roman Grill became assistant coach of the FCB U19 youth team and won the German Youth Championship as a head
Doc 3: Roman Grill. German footballer. In more languages. Spanish. Roman Grill. futbolista alemán. Traditional Chinese. No label defined. 德國足球
Doc 4: Roman Grill. Uefa Cup winner 1. Retired since: Jul 1, 1997. Roman Grill. Date of birth/Age: Mar 1, 1966 (58); Citizenship: Germany. Height: N/A
Doc 5: Roman Grill is a 59-year-old Football ex-player. Born in Germany on 1966-03-01, he played as Defender.