Task: Story Composition
Input (English): Premise: Matt left his window open. 
 Initial Context: His cat got out of the house. 
 Original Ending: Matt looked for his cat. He put posters up to find his cat. Someone called him with his cat. 
 Counterfactual Context: His cat accidentally got stuck on the window.
Output (English): Matt looked for his cat. He put posters up to find his cat. Someone called him to tell him his cat was stuck outside the window.