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: Johnny had always wanted to play football.
Initial Context: One day he met his idol John Elway.
Original Ending: John Elway told him to keep practicing. Every day after school Johnny practiced. Johnny is now the quarterback at his school.
New ending: His baseball coach told him to keep practicing. Every day after school Johnny practiced. Johnny is now the starting pitcher at his school.

SOLUTION: One day he decided to pursue baseball instead.

PROBLEM: Premise: Andy loved watching the Olympic track events.
Initial Context: Andy was excited to see Usain Bolt defend his track title.
Original Ending: As the race was beginning, Andy was anxious to see Bolt race. However, when the gun sounded, Andy knew Bolt would win. Andy was so excited that Usain Bolt won his track race.
New ending: As the race was beginning, Andy was anxious to to race Bolt However, when the gun sounded, Andy knew Bolt would win. Andy was so excited that he got to run with Usain Bolt, even though he won their track race.

SOLUTION: Andy started to train in running so he could join track.

PROBLEM: Premise: Kim was using a computer at a public library for research.
Initial Context: But there was an old woman next to her who could barely type.
Original Ending: Kim began to laugh at how slow the old woman was. And she burst out laughing when her dentures fell on the keyboard. Kim continued to laugh and smile as she was kicked out of the library.
New ending: Kim began to marvel at how fast the kid was. And she burst out laughing when the keys broke on his keyboard. Kim continued to laugh and smile as he was kicked out of the library.

SOLUTION:
But there was a little kid next to her typing way faster than she could.