Complex sentence: Later, Naomi starts a rumor that Mrs. Cushinberry is having an affair with a married professor; soon a riot erupts at school and a crowd of angry parents marches to the school superintendent's house to demand that he fire both teachers.
Split into simpler sentences: Later, Naomi starts a rumor that Mrs. Cushinberry has been having an affair with a married professor, and a riot at the school ensues. The angry crowd of townspeople marches to the school superintendent's house and demands that he fire both teachers.