Complex sentence: Hadžić was born in the village of Pačetin, at the time in SR Croatia, SFR Yugoslavia, and in his youth was politically active as a member of the League of Communists of Yugoslavia.
Split into simpler sentences: Hadžić was born in the village of Pačetin, at the time in SR Croatia, SFR Yugoslavia. He became politically active in his youth as a member of the League of Communists of Yugoslavia.