Complex sentence: He became famous as the winner of the third season of "Deutschland sucht den SuperStar", the German version of "Pop Idol", broadcast between November 2005 and March 2006 by RTL.
Split into simpler sentences: He became famous as the winner of the third season of "Deutschland sucht den SuperStar", the German version of "Pop Idol". This season had been broadcasted between November 2005 and March 2006 by RTL.