Complex sentence: The younger Stevens attended Pioneer Elementary School and Emerson Junior High in Davis, then graduated from Piedmont High School in 1978; he earned a B.A. in history at the University of California, Berkeley in 1982.
Split into simpler sentences: The younger Stevens attended Pioneer Elementary School and Emerson Junior High in Davis, then graduated from Piedmont High School in 1978. He earned a B.A. in history at the University of California, Berkeley, in 1982.