TASK DEFINITION: Given a premise, an initial context, an original ending, and a new ending, the task is to generate the counterfactual context that is aligned with the new ending. Each instance consists of a five-sentence story. The premise is the first sentence of a story, and the second sentence, which is the initial context, provides more information about the story's context. The original ending is the last three sentences of the story. Also, you are given a new ending that can provide the new story with the same premise. You should write a counterfactual context to explain the small differences between the original and new endings. More specifically, a story context contains the general plot of the story. And a counterfactual context is a slight modification to the initial context. To sum up, you should write the second sentence of a story based on the premise(first sentence) and the new ending(last three sentences) of the story.
PROBLEM: Premise: Lara was having a birthday party. 
 Initial Context: Everyone showed up except Tina. 
 Original Ending: Finally Tina showed up. When Tina showed up she was the last one. Tina was upset she was late. 
 New ending: Finally everyone else showed up. When Tina showed up she was the first one. Tina was upset she was so early. 

SOLUTION: Tina was early to the party.

PROBLEM: Premise: We were assigned many book reports in 9th grade English class. 
 Initial Context: Sadly, I did not like to read and never read any of the assignments. 
 Original Ending: Instead, I would create a fake author and title for a book. Then I would invent a storyline and write my report. Somehow I passed English class with very high grades. 
 New ending: So I for the report I would write the author and title for the book. Then I would summarize the storyline and write my report. I passed English class with very high grades. 

SOLUTION: I loved to read, and writing book reports was one of my favorite homework assignments.

PROBLEM: Premise: Terrance was secretly in love with a girl in his class. 
 Initial Context: At the end of the year, he found the courage to ask her to the prom. 
 Original Ending: The girl was surprised but accepted his offer. When Terrence came to pick her up, he gave a her a flower. She kissed him on the cheek and he was in heaven. 
 New ending: The girl surprised him and asked him herself. When Terrence came to pick her up, he gave a her a flower. She kissed him on the cheek and he was in heaven. 

SOLUTION:
At the end of the year, he still hadn't found the courage to ask her to the prom.

