Complex sentence: The song was written by Shelly Peiken and Guy Roche, the two were improvising with a cassette recorded and after Peiken and after improvising some of the songs lyrics Peiken decided to return to it at a later date.
Split into simpler sentences: The song was written by Shelly Peiken and Guy Roche. The two were improvising with a cassette record and Peiken decided to return to it at a later date.