Complex sentence: Dorothy was a representative in the Oregon House for two terms from 1929 to 1931 and was appointed by the Multnomah County commissioners to a vacated seat and then campaigned and won office for five terms as a State Senator 1932--1943.
Split into simpler sentences: Dorothy was a representative in the Oregon House for two terms from 1929 to 1931. She was appointed by the Multnomah County commissioners to a vacated seat, and then campaigned and won office for five terms as a State Senator 1932--1943.