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: Gina prepared food for the family. 
 Initial Context: She cooked lasagna, grilled chicken and garlic bread. 
 Original Ending: As soon as we started to eat, Her mom became nauseous. Afterwards, everyone started to feel queasy. They eventually threw away the food and ordered Chinese food. 
 New ending: As soon as we started to eat, her dad became nauseous. Afterwards, everyone started to feel queasy. They eventually threw away the food and ordered Chinese food. 

SOLUTION: Gina's mom couldn't make it to dinner, so the family ate without her.

PROBLEM: Premise: Sophie wanted to learn how to do gymnastics. 
 Initial Context: She joined a gymnastics gym. 
 Original Ending: She worked really hard to learn to do flips. After months of practice she finally did her first back flip. Now she can do lots of flips. 
 New ending: She had worked really hard to learn to do flips. After months of rehabilitation she finally was able to do back flips again. Now she can do lots of flips. 

SOLUTION: She broke her arm and couldn't join a gymnastics gym.

PROBLEM: Premise: It was thanksgiving and my family was visiting me. 
 Initial Context: They all showed up to my house in the afternoon. 
 Original Ending: Around early evening, it was time to eat. I carved the turkey, and we enjoyed our meal and talked. After dinner, we had some pies that my wife baked. 
 New ending: Around early evening, it was time to eat without them. I carved the turkey, and my wife and I enjoyed our meal and talked. After dinner, we had some pies that my wife baked. 

SOLUTION:
But as the weather forecast indicated heavy storm that day, we had to call it off.

