Complex sentence: Rosel H. Hyde (April 12,1900--December 19,1992) served as chairman of the Federal Communications Commission from April 18,1953, to October 3,1954, and again from May 1,1966, to October 31,1969.
Split into simpler sentences: Rosel H. Hyde (April 12,1900--December 19,1992) served as chairman of the Federal Communications Commission twice. He was chairman from April 18,1953, to October 3,1954, and again from May 1,1966, to October 31,1969.