Complex sentence: After a few weeks'break, the overdubbing phase began on 31 May, starting with "You"'s saxophone solo (played by Horn), extra keyboards and second drum part.
Split into simpler sentences: After a few weeks' break, the overdubbing phase began on 31 May. That day, instruments were added to the 1971 basic track for "You", including a saxophone solo (played by Horn), extra keyboards and a second drum part.