Task: Story Composition
Input (English): Premise: Bertha knew she was getting old, and tried to keep up with her health. 
 Initial Context: She went for regular tests at the doctors, and so far was healthy. 
 Original Ending: But one day the doctor told her they'd detected a mass. She had to go for testing, and was so worried about the results. The mass turned out to be benign, and she was so relieved. 
 Counterfactual Context: She went for regular tests at the doctors, and she was getting worse and worse.
Output (English): One day the doctor told her they'd detected a mass. She had to go for testing, and was so worried about the results and her worsening health. The mass turned out to be benign, and she was so relieved.