Complex sentence: "Winter Season, A Dancer's Journal," was published when she was twenty-two years old by Random House and is the diary of her life as a corps-de-ballet dancer in the New York City Ballet.
Split into simpler sentences: Winter Season, A Dancer's Journal, was published when she was twenty-two years old by Random House. It is a diary of her life as a corps-de-ballet dancer in the New York City Ballet.