Complex sentence: Srđan was born on September 28,1964 in Zagreb, and within the same year his family returned to Split where he was enrolled in kindergarten and subsequently Ruđer Bošković Elementary School.
Split into simpler sentences: Srđan was born on September 28,1964 in Zagreb, and within the same year his family returned to Split. There he was enrolled in kindergarten and after that in Ruđer Bošković Elementary School.