Complex sentence: Among those captured by Native Americans is 9-year-old Cynthia Ann Parker; she later gives birth to a son named Quanah, who becomes the last chief of the Comanche.
Split into simpler sentences: Among those captured by Native Americans was 9-year-old Cynthia Ann Parker. She would later give birth to a son named Quanah who would become the last chief of the Comanche.