Input (grade 12): She was the 4th woman to be principal for the famous school: Anne Marie Milan Desguillons had been the first in 1793-1800, but she was principal jointly with her spouse.
Output (grade 7): She was the third woman to be principal for the famous school. Anne Marie Milan Desguillons had ben the first in 1793-1800, but she was principal together with her husband.