Task: Story Composition
Input (English): Premise: Joey sat by a pond holding a sandwich. 
 Initial Context: His phone rang and he put his sandwich on a rock to answer. 
 Original Ending: He talked for five minutes with a dear friend. When he disconnected, the sandwich was gone. After looking around him, he finally saw it at the bottom of the pond. 
 Counterfactual Context: His phone rang and he took the last bite of his sandwich.
Output (English): He talked for five minutes with a dear friend. When he disconnected, his wallet was gone. After looking around him, he finally saw it at the bottom of the pond.