Conversation so far:
what did Simon & Garfunkel do in the studio?
Simon & Garfunkel's fourth studio album, Bookends, was recorded in fits and starts from late 1966 to early 1968.
did Simon & Garfunkel record any other albums in the studio from late 1966 to early 1968.?

Question: did something happen in 1967?
Self-contained rewrite: did something happen with Simon & Garfunkel in 1967?