Complex sentence: Born on August 16,1875 in Chattanooga, Tennessee, her parents were Jeannette Holmes (née Colwell) and William Dennis Marks, who was the president of the Philadelphia Edison Company, after working at University of Pennsylvania, where he taught engineering.
Split into simpler sentences: Born on August 16,1875 in Chattanooga, Tennessee, her parents were Jeannette Holmes (née Colwell) and William Dennis Marks. Her father was president of the Philadelphia Edison Company, after working at University of Pennsylvania, where he taught engineering.