Complex sentence: In 1944, Jaša Tomić became part of the autonomous province of Vojvodina within the new socialist Yugoslavia, which in 1945 became part of the People's Republic of Serbia within Yugoslavia.
Split into simpler sentences: In 1944, Jaša Tomić became part of the autonomous province of Vojvodina within the new socialist Yugoslavia. In 1945, Vojvodina became part of the People's Republic of Serbia within Yugoslavia.