Complex sentence: Prince George's County was created by the Council of Maryland in the Province of Maryland in 1696 from portions of Charles, and Calvert Counties, and a portion was detached in 1748 to form Frederick County.
Split into simpler sentences: Prince George's County was created by the Council of Maryland in the Province of Maryland in 1696 from portions of Charles and Calvert counties. A portion was detached in 1748 to form Frederick County.