Complex sentence: Curtis served in the House from March 4,1893 until January 28,1907, when he resigned, after being chosen by the Kansas Legislature, to fill the short unexpired term of Senator Joseph R. Burton in the United States Senate.
Split into simpler sentences: Curtis served in the House from March 4,1893 until January 28,1907, when he resigned for the unexpired term of a Senate seat. He had been chosen by the Kansas Legislature to fill the short unexpired term of Senator Joseph R. Burton in the United States Senate.