Complex sentence: Later, he attended the Paul H. Nitze School of Advanced International Studies at The Johns Hopkins University where he received a M.A. in international economics and American Foreign Policy and at the University of Chicago Graduate School of Business where he was graduated with an M.B.A. in finance.
Split into simpler sentences: Later, he attended the Paul H. Nitze School of Advanced International Studies at The Johns Hopkins University where he received a M.A. in international economics and American Foreign Policy. He also attended the University of Chicago Graduate School of Business where he was graduated with an M.B.A. in finance.