Complex sentence: Miriam E. Simpson studied as an undergraduate, and then graduate student, at the University of California, Berkeley; she earned her A.B. in chemistry in 1915 and M.A. in chemistray in 1916.
Split into simpler sentences: Miriam E. Simpson studied as an undergraduate, and then graduate student, at the University of California, Berkeley. She earned an A.B. in chemistry in 1915 and M.A. in chemistry in 1916.