Complex sentence: John Cafiero is an American punk rock musician and film director, film producer, best known as the frontman for the punk supergroup Osaka Popstar, whose debut album was released the summer 2006.
Split into simpler sentences: John Cafiero is an American punk rock musician and film director, film producer. He is best known as the frontman for the punk supergroup Osaka Popstar, whose debut album was released the summer 2006.