Complex sentence: In the episode "She's Come Undone", it was revealed that CeCe witnessed a fight between Spencer Hastings and Alison DiLaurentis the night of Ali's disappearance and that Jessica DiLaurentis paid CeCe to be quiet about it.
Split into simpler sentences: In the episode "She's Come Undone", it was revealed that CeCe witnessed a fight between Spencer Hastings and Alison DiLaurentis the night of Ali's disappearance. Also, Jessica DiLaurentis paid CeCe to be quiet about it.