Complex sentence: Nikolay Fyodorovich Bugay (born 19 December 1941) is a Russian historian, Doctor of Historical Sciences, Chief Researcher at the Institute of History of the Russian Academy of Sciences, and adviser of the Department of Interethnic Relations of the Ministry of Regional Development of Russia.
Split into simpler sentences: Nikolay Fyodorovich Bugay (born 19 December 1941) is a Russian historian. He is Doctor of Historical Sciences, Chief Researcher at the Institute of History of the Russian Academy of Sciences, and adviser of the Department of Interethnic Relations of the Ministry of Regional Development of Russia.