Complex sentence: In 1939, at a very young age, she graduated from the Conservatory Santa Cecilia, where she was able to study with Alfredo Casella and Germano Arnaldi, and debuted at eighteen as a soloist at the Teatro alla Scala in Milan.
Split into simpler sentences: In 1939, at a very young age, she graduated from the Accademia Nazionale di Santa Cecilia (Santa Cecilia Conservatory), where she was able to study with Alfredo Casella and Germano Arnaldi. She debuted at eighteen as a soloist at the Teatro alla Scala in Milan.