Complex sentence: It's there where she was to dance many of her leading roles for the first time, including her first Aurora in Sleeping Beauty, Street Dancer in Don Quixote, and one of her greatest roles, the fiery Zarema in The Fountain of Bakhchisarai.
Split into simpler sentences: It's there where she was to dance many of her leading roles for the first time. Here came her first Aurora in Sleeping Beauty, Street Dancer in Don Quixote, and one of her greatest roles, the fiery Zarema in The Fountain of Bakhchisarai.