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.

Example Input: Sentence1: Celina is very old. Sentence2: Her hips are always sore. Sentence3: It is hard for her to walk. Sentence4: It helped her a lot.
Example Output: 4, One day, she obtained a walker.

Example Input: Sentence1: Cara went to a food cart in Philadelphia the other day. Sentence2: She stopped by an amazing falafel cart. Sentence3: The food was amazing. Sentence4: Cara couldn't believe how good it was.
Example Output: 5, Cara decided to eat at the food cart every week.

Example Input: Sentence1: Amy wanted more space in her home. Sentence2: She decided to look for a new apartment. Sentence3: Amy found a new apartment for the right price near her job. Sentence4: Amy visited the apartment to see it in person.
Example Output:
5, Amy signed a lease and moved into the apartment.