Question: Margaret Bailey was the headmistress of which nondenominational boarding school in Sydney?
Sentence (from "Concho Indian Boarding School"): Concho Indian Boarding School (also known as the Cheyenne-Arapaho Boarding School at Concho or Concho Indian School and home to the Concho Demonstration School) was a boarding school for members of the Cheyenne and Arapaho Tribes and later opened to other Native American students.
Relevant evidence: No