Task: Story Composition
Input (English): Premise: Bill went on vacation to Mexico. 
 Initial Context: It was very sunny and bright. 
 Original Ending: Bill decided to get a hat to block out the sun. He looked at sombreros and baseball caps. Eventually Bill chose a large cowboy hat. 
 Counterfactual Context: It was a very rainy and overcast.
Output (English): Bill decided to get a hat to block out the sun if it ever showed up. He looked at sombreros and baseball caps. Eventually Bill chose a large cowboy hat.