Complex sentence: In 2003, Diran and Garo Tavitjan formed a music group called "The Tavitjan Brothers", one of the finest and most renowned Macedonian music products abroad.
Split into simpler sentences: In 2003, Diran and Garo Tavitjan formed a music group called "The Tavitjan Brothers". Over the years they became one of the finest and most renowned Macedonian music products abroad.