Complex sentence: He served in both houses of the state legislature and represented Massachusetts in the United States House of Representatives in the 3rd United States Congress from March 4,1791 to March 3,1795.
Split into simpler sentences: He served in both houses of the state legislature. He was elected to represent Massachusetts in the United States House of Representatives in the 3rd United States Congress from March 4,1791 to March 3,1795.