Complex sentence: Harrison served in the Senate from March 4,1881, to March 4,1887 and chaired the U.S. Senate Committee on Transportation Routes to the Seaboard (47th Congress) and U.S. Senate Committee on Territories (48th and 49th Congresses).
Split into simpler sentences: Harrison served in the Senate from March 4,1881, to March 4,1887. He was chairman of the U.S. Senate Committee on Transportation Routes to the Seaboard (47th Congress) and U.S. Senate Committee on Territories (48th and 49th Congresses).