Complex sentence: In 1982, to celebrate 75 years of Oklahoma statehood Garfield County Historical Society and the Museum of the Cherokee Strip held Indian Week which featured art by Paladine Roye, Burgess Roye, and their mother, Doris Roye.
Split into simpler sentences: In 1982, to celebrate 75 years of Oklahoma statehood, the Garfield County Historical Society and the Museum of the Cherokee Strip held Indian Week. They featured art by Paladine and Burgess Roye, and their mother, Doris Roye.