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 is the name of the private equity firm that owns the Equity Office?" whose answer is The Blackstone Group.
Each document should contain about 30 words, and these documents should contain useful information.

Query: "private equity firm that owns Equity Office"
Useful Output:

Doc 1: In February 2007, The Blackstone Group, led by Jonathan Gray, acquired Sam Zell's Equity Office Properties Trust (EOP) for $39 Billion (including debt).
Doc 2: Equity Office, the U.S. office portfolio company wholly-owned by Blackstone's real estate funds, announced today the launch of a new identity
Doc 3: Private-equity firm Blackstone late Sunday said its real-estate affiliate agreed to buy Equity Office EOP, a REIT, for $36 billion including
Doc 4: Pathstone, “The Family Office,” today announced a new strategic equity investment from Kelso & Company (“Kelso”), a leading private equity firm focused on
Doc 5: Bain Capital Private Equity pioneered the value-added investment approach. We partner with management teams to help build and grow great companies.