Task: Story Composition
Input (English): Premise: Dan recently asked his teenage son to help him mow the lawn. 
 Initial Context: The teenage quickly stated that he had homework to do. 
 Original Ending: Dan, believing the excuse mowed the lawn himself. However, when Dan went to check on his son, he was asleep. Dan realized that he had a lazy teenager on his hands. 
 Counterfactual Context: His son quickly agreed to mow the lawn.
Output (English): Dan believed the lawn was mowed. However, when Dan went to check on his son, he was asleep. Dan realized that he had a lazy teenager on his hands.