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 day did Led Zeppelin release their album that contained The Crunge?" whose answer is 28 March 1973.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was physical graffiti released
Useful Output:

Doc 1: Physical Graffiti is regarded by many as Led Zeppelin's last great album. It was recorded over several years, taking in reworked versions of
Doc 2: On February 24, 1975, Led Zeppelin released their sixth album, "Physical Graffiti," which includes hits like "Ten Years Gone" and Robert
Doc 3: Released in November 1969, and featuring the US No. 4 single 'Whole Lotta Love', it went on to stay on the UK chart for 138 weeks. Also reaching
Doc 4: Released in 1975 as Led Zeppelin's first album on their own Swan Song Records, the double LP was a sprawling, genre-defying statement that
Doc 5: Fifty years ago, the greatest rock band of all time released their greatest album. In late February, 1975, Led Zeppelin put out Physical Graffiti.