Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Premise: There was a large, old tree in the ditch across the street.
Initial Context: The tree was an oak, and sloped downward into the ditch.
Original Ending: In the tree was a giant hole, and the kids would crawl into it. We called it our treehouse, and we put a board in front of it. One day some younger kids took over our treehouse.
New ending: There had been a tree with a giant hole, and the kids would crawl into it. We had called it our treehouse, and we put a board in front of it. One day some younger kids took over our treehouse, then city had came and torn it down.
Student:
The city came and cleared it completely.