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: "when was a whiter shade of pale released?" whose answer is 12 May 1967.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when was a whiter shade of pale released
Useful Output:

Doc 1: It was the debut single by the British rock band Procol Harum, released 12 May 1967. It reached number 1 in the UK Singles Chart and
Doc 2: “A Whiter Shade Of Pale” is believed to be a poetic journey through a drunken seduction, which is described by way of references to sex as a
Doc 3: Released in the Summer of Love in 1967, this classic song introduced a new phrase into the English language and was one of John Lennon's
Doc 4: They released “Whiter Shade of Pale” as a single in 1967 to great success as mentioned earlier, and it has appeared on numerous of the
Doc 5: While initially credited to Brooker and Reid, organist Fisher successfully sued to have his name added to the credits and publishing in 2009,