Complex sentence: In 1950 and 1951 Brown ran for a seat on the Michigan State Senate but was defeated.On November 4,1952, she ran again and won, and served for two terms (1953--1956).
Split into simpler sentences: In 1950 and 1951, she ran for a seat on the Michigan State Senate but was defeated. In 1952, she ran agai, won, and served for two terms (1953-1956).