Complex sentence: She taught at female academies, first in Danville, Kentucky, then in Cartersville, Georgia, where she and her friend, Anna Safford, opened Cartersville Female High School in 1871.
Split into simpler sentences: She taught at female academies, first in Danville, Kentucky. In Cartersville, Georgia, Moon and her friend, Anna Safford, opened Cartersville Female High School in 1871.