Complex sentence: After telling Mr. Krupp that they sold most of the school's furniture to pay for the carnival and running away for their lives, Ms. Anthrope snaps her fingers, causing George and Harold to run after Captain Underpants again !
Split into simpler sentences: After telling Mr. Krupp that they sold most of the school's furniture to pay for the carnival and running away for their lives. But Ms. Anthrope snaps her fingers, causing George and Harold to run after Captain Underpants again!