Complex sentence: Sellier ran unsuccessfully for election to the senate in January 1927, but was elected senator for the Seine in the first round in the elections of 20 October 1935 on the Popular Front list.
Split into simpler sentences: Sellier ran unsuccessfully for election to the senate in January 1927. He was elected senator for the Seine in the first round in the elections of 20 October 1935 on the Popular Front list.