Complex sentence: These two principals organized a third-class high school in 1919 at Rock House, in the fall of that year, they moved the new Rock House High School to Upper Elk with Claude Dove as principals.
Split into simpler sentences: These two principals organized a third-class high school in 1919 at Rock House. In the fall of that year, they moved the new Rock House High School to Upper Elk with Claude Dove as principals.