Task: Story Composition
Input (English): Premise: Tom was drinking tap water. 
 Initial Context: But not matter how much he drank, he was still thirsty. 
 Original Ending: He was worried something was wrong with his tap water. So he installed a water filter. And the water tasted much better. 
 Counterfactual Context: But nothing is coming out.
Output (English): He was worried something was wrong with the pipes. So he installed new pipes. Water came out and the water tasted much better too.