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 album in which John Gatchell collaborated with Paul Simon in 1981 was performed in front of how many people?" whose answer is more than 500,000.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Paul Simon Concert in Central Park 1981 attendance
Useful Output:

Doc 1: In September of 1981, Simon and Garfunkel played a free benefit concert in New York's Central Park where Paul performed “50 Ways to Leave Your Lover”!
Doc 2: In fact, early estimates put Simon's Central Park solo show among the most heavily attended events in history, suggesting that roughly 600,000
Doc 3: What they thought would be a small benefit concert turned into half a million people gathering on the Great Lawn in Central Park to watch the
Doc 4: Recording and release​​ Later estimates determined that the maximum number of people who could fit in the park space was 48,500. The concert was similar to The
Doc 5: On September 19, 1981, Paul Simon and Art Garfunkel got up in front of 500,000 people in New York City and played a show.