Complex sentence: Breed was the dean of women at Indiana University from 1901 to 1906 (the first female dean at the university), a position from which she denounced the segregation of men and women into certain academic fields.
Split into simpler sentences: Breed was the dean of women at Indiana University from 1901 to 1906, making her the first female dean at Indiana University. She used her position to denounce the segregation of men and women into certain academic fields.