In this task, you're given four sentences of a story written in natural language in which one part is missing. Your job is to predict the position and missing part of the story and return in the following format: position, missing part. The missing part is a sentence that completes the story, and the position is the number of the missing sentence in the new story.

Sentence1: One cat didn't mind the new dog, but the other cat was scared. Sentence2: He meowed loudly and scratched the dog's nose. Sentence3: He leaped from one side of the room to the other to escape the dog. Sentence4: The dog found him and mauled him.
1, One day, a dog moved into a family that had two cats.