Complex sentence: During the Pornography Tour in 1982, a series of incidents prompted Gallup to leave The Cure, including an incident when he got into a fist fight with Robert Smith at a nightclub reportedly over a bar-tab.
Split into simpler sentences: During the Pornography Tour in 1982, a series of incidents prompted Gallup to leave The Cure. The first incident occurred when he got into a fist fight with Robert Smith at a nightclub reportedly over a bar-tab.