Complex sentence: Jelavić is a former Croatian international; he made his debut in 2009 and has played for the team until his last game at 2014, and has represented the country at UEFA Euro 2012 and the 2014 FIFA World Cup.
Split into simpler sentences: Jelavić is a former Croatian international; he made his debut in 2009 and retired in 2014. He has represented the country at UEFA Euro 2012 and the 2014 FIFA World Cup.