Complex sentence: Born in Montville, Maine, Milliken attended the common schools and Waterville College (now Colby College) before graduating from Union College, Schenectady, New York, in 1856.
Split into simpler sentences: Born in Montville, Maine, Milliken attended the common schools and Waterville College. He was graduated from Union College, Schenectady, New York, in 1856.