Complex sentence: Graff, 78 Frances Folsom was a student at Wells College; when she returned to school, President Cleveland received her mother's permission to correspond with her and they were soon engaged to be married.
Split into simpler sentences: Graff, 78 Frances Folsom was a student at Wells College. When she returned to school, President Cleveland received her mother's permission to correspond with her, and they were soon engaged to be married.