Complex sentence: John attended school there from 1851 to 1856, and then moved to a teaching school, the Preparatory Department of the Institute for Colored Youth where Ebenezer Bassett was the principal.
Split into simpler sentences: John attended school there from 1851 to 1856. He moved to a teaching school, the Preparatory Department of the Institute for Colored Youth, where Ebenezer Bassett was the principal.