Task: Story Composition
Input (English): Premise: Wendy put a hamburger on the barbecue. 
 Initial Context: She went inside while the hamburger cooked. 
 Original Ending: She came back outside to check on the hamburger. The hamburger was gone! Down the street there was a dog eating a hamburger. 
 Counterfactual Context: She sat down in front of the barbecue while the hamburger cooked.
Output (English): She looked up from her book to check on the hamburger. The hamburger was gone! Down the street there was a dog eating a hamburger.