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: Clara went home from work one day. Sentence2: Her keys were left on the kitchen table that morning. Sentence3: She had to call her mom for help. Sentence4: Clara's mom helped right away.
A:
2, Then she realized she had locked herself out!