Complex sentence: This triumph opened her wide the Italian halls, and as soon as she graduated she embarked on a tour, debuting in the Maggio Musicale Fiorentino, she culminated with her German debut in Munich; she was immediately contracted by Deutsche Grammophon.
Split into simpler sentences: This triumph opened her wide the Italian halls, and as soon as she graduated she embarked on a tour, debuting in the Maggio Musicale Fiorentino. She finished with her German debut in Munich and she was immediately contracted by Deutsche Grammophon.