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 grand marshall of the 2005 Pepsi 400 was White House Chief of staff during what years?" whose answer is 1974–1975.
Each document should contain about 30 words, and these documents should contain useful information.

Query: George W. Bush White House Chief of Staff years
Useful Output:

Doc 1: George W. Bush White House chief of staff Andy Card on Capitol Hill riots. 15K views · 4 years ago #CNBC #CNBCTV more. CNBC Television. 3.06M.
Doc 2: Andy Card, who served as George W. Bush's chief of staff for five years, admitted to Leibovich that he has more than one concern as Priebus
Doc 3: George W. Bush - Administration ; Secretary of State. Colin L. Powell (2001–2005) ; Secretary of State. Condoleezza Rice (2005–2009) ; Secretary of Defense. Robert
Doc 4: As Chief of Staff for over five years, Card is the second longest tenured White House Chief of Staff in history, and the longest serving since President
Doc 5: George W. Bush is the 43rd president of the United States (2001–09), who led his country's response to the September 11 terrorist attacks in