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: "when did the millennium dome became the o2 arena?" whose answer is 31 May 2005.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did the millennium dome become the o2 arena
Useful Output:

Doc 1: The Millenium Dome was renamed the O2 arena in 2005. Newly  dome, which has since become The O2 arena, to Swindon. The plan was
Doc 2: Since it first opened on New Year's Eve 1999, the Millenium Dome has become The O2 Arena. Meet One of Your New Instructors.
Doc 3: The first image isn't from the Millennium Dome, it's from 2012 - In the night garden I think when this came up before. All I remember, never
Doc 4: Then the opening night happened, 31 December 1999, which must go down as one of the greatest PR disasters in history. Thousands of VIPs, invited
Doc 5: Opening to great fanfare on Dec. 31, 1999, on the cusp of the new millennium with Queen Elizabeth II and U.K. Prime Minister Tony Blair in