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: "The person that formed The Jeff Beck Group had been a guitarist in a group formed when?" whose answer is 1963.
Each document should contain about 30 words, and these documents should contain useful information.

Query: when did Jeff Beck join a group as guitarist before forming The Jeff Beck Group
Useful Output:

Doc 1: Jimmy Page eventually joined Jeff Beck in the Yardbirds, and he was briefly in the band as the only guitarist before leaving to form “The New
Doc 2: For the October 1974 sessions at London's AIR Studios, Beck assembled a stripped-down band with Max Middleton, bassist Phil Chenn, and drummer
Doc 3: Beck replaced Eric Clapton in The Yardbirds in 1965, after Clapton left to join John Mayall's Bluesbreakers. In 1966, Jimmy Page joined the band
Doc 4: Having been terminated by the Yardbirds, in early 1967 Jeff Beck formed the original Jeff Beck Group with Rod Stewart on vocals, future Faces
Doc 5: More than any other guitar before him, Beck defined the role of the lead guitarist as the focus of a band beginning with The Yardbirds. His