Complex sentence: Both McCartney and John Lennon, at one time or another, shared their low opinion for the song, and in a 1980s interview with Mark Lewisohn, McCartney says, I can't remember much about that one.
Split into simpler sentences: Both McCartney and John Lennon, at one time or another, shared their low opinion of the song. In a 1980s interview with Mark Lewisohn, McCartney says, I can't remember much about that one.