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: Sean wanted to go out for a picnic. Sentence2: He packed himself a lunch in a basket. Sentence3: Then, he rode his bike off to a field. Sentence4: In the field, he ate his picnic.
Example Output: 5, Sean loved the outdoors.

Example Input: Sentence1: She didn't know how it happened. Sentence2: She convinced the family to keep the kittens. Sentence3: It wound up having 7 kittens. Sentence4: Dorothy made sure to buy lots of cat food.
Example Output: 1, Dorothy's cat was pregnant.

Example Input: Sentence1: Tom was wrapping Christmas presents. Sentence2: But he lost track of who they were for. Sentence3: So he put wrong name tags on the presents. Sentence4: His son was bewildered when he unwrapped a dollhouse.
Example Output:
4, On Christmas, Tom handed his son a present.