Complex sentence: He was born and grew up in Waterville, Maine and attended Colby College in Maine where he graduated in 1883, whereupon he took the job of organizing the newly created Madison Normal School.
Split into simpler sentences: He was born and grew up in Waterville, Maine and attended Colby College in Maine where he graduated in 1883. Whereupon he took the job of organizing the newly created Madison Normal School.