Complex sentence: After finishing his bachelor's degree at Georgia State University in 1966, Powell enrolled in the doctoral program in political science at Emory University; there, he earned an M.A. in the discipline before leaving the program.
Split into simpler sentences: After finishing his bachelor's degree at Georgia State University in 1966, Powell enrolled in the doctoral program in political science at Emory University. He earned an M.A. in the discipline before leaving the program.