Complex sentence: William H. Sullivan, the sawmill manager for the Goodyears, was town boss when the city was built (1906--1907) and served as mayor until he died on June 26,1929.
Split into simpler sentences: William H. Sullivan, the sawmill manager for the Goodyears, was town boss when the city was built (1906--1907). He served as mayor until he died on June 26,1929.