Task: Story Composition
Input (English): Premise: Clark had a friend named Kevin who had a crush on some girl he met. 
 Initial Context: Clark was tired of hearing Kevin talk about this girl. 
 Original Ending: Finally he asked Kevin to introduce him to the girl so Kevin shut up. Kevin looked at him with his mouth hanging open. How could Clark not know his own sister! 
 Counterfactual Context: Clark was excited  of hearing Kevin talk about this girl.
Output (English): Finally he asked Kevin to introduce him to the girl so Kevin would be happy. Kevin looked at him with his mouth hanging open. How could Clark not know his own sister!