Complex sentence: His roots can be traced to the ethnic Serbs migrated in 1538 to the Krajina territories of Hapsburg, Austria during the Ottoman Empire conflicts in the Balkan region where his great-grandfather held the title of Baron Jovan Zivkovic during the Austro-Hungarian period.
Split into simpler sentences: His roots can be traced to the ethnic Serbs who migrated in 1538 to the Krajina territories of Hapsburg, Austria during the Ottoman Empire conflicts in the Balkan region. His great-grandfather held the title of Baron Jovan Zivkovic during the Austro-Hungarian period.