Task: Story Composition
Input (English): Premise: The family decided to go on a picnic. 
 Initial Context: They packed a big lunch to take with them. 
 Original Ending: When they got to the park, mom went to get the lunch. They had left the lunch at home. They went out to eat instead. 
 Counterfactual Context: They packed a big lunch and took it with them.
Output (English): When they got to the park, mom went to get the lunch. It turned out that they had left the lunch at home. They went out to eat instead.