Complex sentence: He was elected in 1914 to the Senate and served from March 4,1915, until his death three years later in New Iberia; while in the Senate he was chairman of the Committee on National Banks (Sixty-fourth and Sixty-fifth Congresses).
Split into simpler sentences: He was elected in 1914 to the Senate and served from March 4,1915, until his death three years later in New Iberia. In the Senate he was chairman of the Committee on National Banks (Sixty-fourth and Sixty-fifth Congresses).