Input (grade 12): One hundred years later Katara, a fourteen-year-old Waterbender girl, and her older warrior brother, fifteen-year-old Sokka, free Aang and Appa from the iceberg.
Output (grade 11): A hundred years later Katara, a fourteen-year-old Waterbender girl, and her older warrior brother, Sokka, free Aang and Appa from the iceberg.