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: 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: Charles and his wife were going to have a baby.
Initial Context: They already had two kids.
Original Ending: He and his wife decided they needed a larger car. Charles and his wife traded in their car. They used it as a down payment towards a mini van.
New ending: He and his wife decided it was the perfect time to have a chiled. Charles and his wife quit using birth control pills and gave it a shot. They are now pregnant and expecting a healthy baby.

SOLUTION: They already had a van, but this was their first kid.

PROBLEM: Premise: My sister in law is a waitress.
Initial Context: Recently her thumb locked up on her.
Original Ending: She went to a doctor, then a specialist. She has a bone spur and a sprain. She is hoping medication can help.
New ending: She did go to the doctor for a foot injury. She has a bone spur and a sprain She is hoping medication can help

SOLUTION:
She never had any problems with her thumb.