Complex sentence: Adolfo Camarillo became one of the wealthiest landowners in the county, and in 1911 he was elected chairman of the Ventura County Board of Supervisors, and a member of the State Board of Agriculture.
Split into simpler sentences: Adolfo Camarillo became one of the wealthiest landowners in the county, and in 1911 he was elected chairman of the Ventura County Board of Supervisors. He also served as a member of the State Board of Agriculture.