Complex sentence: He received his B.A. (1937) and M.A. (1939) from the University of Southern California, then pursued his Ph.D. from the University of Wisconsin-Madison, under the direction of William B. Hesseltine, graduating in 1942.
Split into simpler sentences: He received his B.A. (1937) and M.A. (1939) from the University of Southern California. He then pursued his Ph.D. from the University of Wisconsin-Madison, under the direction of William B. Hesseltine, and graduated in 1942.