Task: Story Composition
Input (English): Premise: Mark had a report due on tigers for school. 
 Initial Context: He spent all week doing research on tigers. 
 Original Ending: Mark really enjoyed looking at pictures of tigers. He also enjoyed all the books he got to read about tigers. Mark thinks he'll do very well on his report. 
 Counterfactual Context: He spent all week doing research on lions and did not realize the report was supposed to be on tigers.
Output (English): Mark really enjoyed looking at pictures of lions. He also enjoyed all the books he got to read about lions. Mark wishes the  report had been about lions.