Complex sentence: He was also a member of the city council from 1926 to 1955 (except World War II), serving as deputy mayor of Harstad from 1929 to 1930 and mayor from 1946 to 1947.
Split into simpler sentences: He was also a member of the city council. He served as deputy mayor of Harstad from 1929 to 1930 and mayor from 1946 to 1947.