Task: Story Composition
Input (English): Premise: Sasha wanted a unicorn for Christmas. 
 Initial Context: She had a pet horse in the stable. 
 Original Ending: Sasha wanted one with a pretty horn on its head. She begged her mom all day before Christmas. Sasha woke up to her horse having a horn taped to its temple. 
 Counterfactual Context: Her mom told her that unicorns dont exist.
Output (English): She didn't believe her and wanted a horse with a pretty horn on its head She begged her mom all day before Christmas Sasha woke up to her horse having a horn taped to its temple