Complex sentence: She is called into Andy's school to meet with the principal regarding an incident in which Andy tore off a classmate's fingernails; the principal suspends the classmate and warns Cora that something must be done about Andy's behavior.
Split into simpler sentences: She is called into Andy's school to meet with the principal regarding an incident in which Andy tore off a classmate's fingernails. The principal suspends the classmate and warns Cora that something must be done about Andy's behavior.