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: She was unsure as to whether she should open the door or not. Sentence2: Slowly she creaked open the door and peered outside. Sentence3: Her brother leaped out at her and gave her a good scare. Sentence4: She screamed and pushed her brother away.
Example Output: 1, The doorbell rang but no one was there.

Example Input: Sentence1: Sam hopped into his mail truck and drove off. Sentence2: He was trying to do his route fast to get home early today. Sentence3: He drove so fast he didn't see a pothole in the road. Sentence4: The truck bounced hard when he hit the pothole.
Example Output: 5, Sam's head hit the steering wheel.

Example Input: Sentence1: Emmy's dad took her to chose a kitten. Sentence2: There were two together in a cage. Sentence3: It made her sad to have to chose. Sentence4: Then, Emmy's dad said she could keep both kittens.
Example Output:
3, She couldn't split them up!