Complex sentence: Vitti's first film role was in Ettore Scola's "Ridere Ridere Ridere" (1954), but her first important performance was in Mario Amendola's "Le dritte" (1958).
Split into simpler sentences: Vitti's first film role was in Ettore Scola's "Ridere Ridere Ridere" (1954). Her first important role was in Mario Amendola's "Le dritte" (1958).