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 wrote the song let's stay together?" whose answer is Al Jackson, Jr..
Each document should contain about 30 words, and these documents should contain useful information.

Query: who wrote the song let's stay together
Useful Output:

Doc 1: FIFTY YEARS OF THE ICONIC WILLIE MITCHELL-PRODUCED 'LET'S STAY TOGETHER' BY AL GREEN  Now regarded a staple of the 1970s music scene,
Doc 2:  Let's Stay Together,” the title track of the third album that Green recorded with Mitchell. Mitchell co-wrote the song's music with Al
Doc 3: Al Green was not confident that "Let's Stay Together" would be a hit according to Willie Mitchell, the song's co writer and producer.
Doc 4: Happy 50th Anniversary to Al Green's fourth studio album Let's Stay Together, originally released January 31, 1972.
Doc 5: Al Green, 'Let's Stay Together' (1972). Between January 1972 and April 1973, Al Green released three classic albums. This was the first of them.