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.

Premise: Sampson was a strong and ferocious Rottweiler. 
 Initial Context: One day, a neighbor girl jumped the fence into his yard. 
 Original Ending: Sampson chased her and the girl screamed, fearing attack. The dog jumped on her and pinned her to the ground. Instead of biting, Sampson licked her face and wagged his tail. 
 New ending: Sampson chased him and the boy screamed, fearing attack. The dog jumped on him and pinned him to the ground. Instead of biting, Sampson licked his face and wagged his tail. 
One day, a neighbor boy looked through the fence gate.