Complex sentence: He earned master's degree in History and History of Eastern Europe at the University of Szeged, followed by postgraduate studies in economic and social history at the Corvinus University Budapest, in the United States (Minneapolis) and in Germany (Münster).
Split into simpler sentences: He earned master's degree in History and History of Eastern Europe at the University of Szeged. He carried out postgraduate studies in economic and social history at the Corvinus University Budapest in the United States (Minneapolis) and in Germany (Münster).