Complex sentence: She also created roles in Pietro Mascagni's "Il piccolo Marat" and Riccardo Zandonai's "Giulietta e Romeo", and was an important interpreter of the latter's "Francesca da Rimini".
Split into simpler sentences: She also created roles in Pietro Mascagni's "Il piccolo Marat" and Riccardo Zandonai's "Giulietta e Romeo". She was also an important interpreter of that composer's "Francesca da Rimini".