Complex sentence: He completed his B.A. and M.A. in mathematics at Osmania University and the University of Madras respectively before going to Princeton to earn his Ph.D; his advisor was Emil Artin.
Split into simpler sentences: He completed his B.A. and M.A. in mathematics at Osmania University and the University of Madras respectively before going to Princeton. KGR completed his Ph.D; his advisor was Emil Artin.