Complex sentence: His doctoral advisor was Hidajet Repovac, Professor of Sociology at Faculty of Political Science in Sarajevo who was part of the Foundation as early as 2007 and one of the co-chairmen of the 2008 International Conference on the Bosnian Pyramids.
Split into simpler sentences: His doctoral advisor was Hidajet Repovac, Professor of Sociology at Faculty of Political Science in Sarajevo. Repovac was part of the Foundation as early as 2007 and one of the co-chairmen of the 2008 International Conference on the Bosnian Pyramids.