Task: Story Composition
Input (English): Premise: I love to play checkers. 
 Initial Context: I challenge my brother to play all the time. 
 Original Ending: I have always won against him. Today, my brother won. I do not love to play checkers any more. 
 Counterfactual Context: I challenge my sister to play all the time.
Output (English): I have always won against her. Today, my sister won. I do not love to play checkers any more.