Complex sentence: Carrie White is a shy, friendless 17-year old girl abused by her unstable mother Margaret, who is a religious fanatic and she is the scapegoat of her school and of her city.
Split into simpler sentences: Carrie White is a shy, friendless 17-year old girl abused by her unstable mother Margaret, who is a religious fanatic. Carrie is also the scapegoat of her school and of her city.