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: "What co-founder of the band Pink Floyd wrote and performed "Granchester Meadows"?" whose answer is Roger Waters.
Each document should contain about 30 words, and these documents should contain useful information.

Query: who wrote and performed Granchester Meadows by Pink Floyd
Useful Output:

Doc 1: Roger probably began work on Grantchester Meadows in late January or early February of 1969, and finished it in early April. It was subsequently
Doc 2: Penned and originally performed entirely by Roger Waters, the new video features a special group performance with additional guitars and
Doc 3: No Dark Sarcasm Here: Pink Floyd Release New Music Video for 'Grantchester Meadows'. Portrait of Devon Ivie. By Devon Ivie, a staff writer
Doc 4: The clip features Roger Waters, who wrote the song, on vocals and acoustic guitar, accompanied by David Gilmour, who also plays acoustic guitar and contributes
Doc 5: The BBC version finds Waters sharing guitar and vocal duties with David Gilmour and, toward the end of the performance, Richard Wright joins in