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 best selling male artist of all time?" whose answer is Elvis Presley.
Each document should contain about 30 words, and these documents should contain useful information.

Query: best selling male artist of all time
Useful Output:

Doc 1:  best selling male artist of all time. : r/Drizzy  Drake just passed Bruce Springsteen as the 8th best selling male artist of all time.
Doc 2: The Beatles are the highest selling music artists with over 600 million album records sold, followed by Elvis Presley holds over 500 million
Doc 3: Elvis Presley tops the chart with combined sales of over 21.7 million singles. And despite his tragic death in 1977, Elvis' legacy lives on
Doc 4: The Top 20 Male Singers Ever · 1. Michael Jackson · 2. Freddie Mercury · 3. Elvis Presley · 4. Sir Paul McCartney · 5. Luciano Pavarotti · 6.
Doc 5: The Top 60 Male Artists of All-Time, From Elton John to Elvis Presley & More. As we celebrate the Billboard Hot 100's 60th anniversary,