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: "Al Vandenberg was a photographer who assisted with the cover for which 1967 Beatles album?" whose answer is Sgt. Pepper's Lonely Hearts Club Band.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Al Vandenberg Beatles 1967 album cover
Useful Output:

Doc 1: Al Vandenberg (1932–2012) was an American photographer notable for his street portraiture and collaboration on the album cover of Sgt Pepper's Lonely Hearts
Doc 2: The photos in the new monograph capture the wildly diverse subcultures of London at the time, from mods and rockers to punks and new romantics.
Doc 3: Until recently, American photographer Al Vandenberg (1932-2012) was best remembered for his art direction of The Beatles' iconic album cover
Doc 4: Al Vandenberg (1932–2012) was an American photographer notable for his street portraiture and collaboration on the album cover of Sgt Pepper's Lonely Hearts
Doc 5: In 1967 he was involved in the art direction of The Beatles' Sgt Peppers Lonely Hearts Club Band album cover. After a period of travelling, Vandenberg