Complex sentence: Wirth is a graduate of Graland Country Day School (1954) in Denver, CO, Phillips Exeter Academy, received his B.A. and graduate degree from Harvard University and was awarded a PhD from Stanford University in 1973.
Split into simpler sentences: Wirth is a graduate of Graland Country Day School (1954) in Denver, CO, and Phillips Exeter Academy. He received his B.A. and graduate degree from Harvard University and was awarded a PhD from Stanford University in 1973.