Complex sentence: Croatian Society of Historians "Dr Rudolf Horvat" is society established in 2008. by Blanka Matković and Stipe Pilić. Main interest of society is researching of Croatian history in WWI, WWII and communist regime in Croatia after WWII.
Split into simpler sentences: Croatian Society of Historians "Dr Rudolf Horvat" is society established in 2008. The, ain interest of society is researching of Croatian history in WWI, WWII and communist regime in Croatia after WWII.