Complex sentence: The first general outline of post- 1945 borders of Croatia was made by the Anti-Fascist Council for the National Liberation of Yugoslavia on 24 February 1945, however some issues regarding the border, such as Baranja, were left unresolved.
Split into simpler sentences: The first general outline of the post- 1945 borders of Croatia was made by the Anti-Fascist Council for the National Liberation of Yugoslavia on 24 February 1945. Some issues regarding the border, such as Baranja, were left unresolved.