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 played guitar on top of buckingham palace?" whose answer is Brian May.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who played guitar on top of buckingham palace
Useful Output:

Doc 1: May had previously hinted at trying to top his previous appearance at the palace, where he performed on the roof to mark the Queen's golden
Doc 2: Sir Brian is no stranger to Buckingham Palace, having performed during the Golden Jubilee in 2002, playing a solo guitar version of God Save The
Doc 3:  played his version of the national anthem from the roof of Buckingham Palace.Now the guitarist is to revisit that moment when the band Queen
Doc 4: Brian May has recalled his terror at performing God Save The Queen solo live on the roof of Buckingham Palace during the Queen's Golden Jubilee Celebrations.
Doc 5: In 2002, a host of iconic music legends and then-popular artists came together to perform at Buckingham Palace for a truly unique concert. The