Complex sentence: The song was also recorded in a radically altered and shortened single version, which went unreleased until its inclusion on the Genesis Archive 1967-75 box set in 1998.
Split into simpler sentences: The song was also re-recorded in a radically altered and shortened single version. Though not actually released as a single, this version ended up on a few compilations, most notably the Genesis Archive 1967-75 box set in 1998.