Detailed Instructions: 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.
Q: Sentence1: Johnny takes a trip down the stairs at his home. Sentence2: Now Johnny has a bruised knee. Sentence3: His mom comforts him. Sentence4: Eventually Johnny feels better.
A:
5, Johnny is more careful on the stairs from now on.