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: 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.

Example Input: Sentence1: Gina went to her 6th hour class. Sentence2: Gina hated gym, and all things related. Sentence3: She was horrified when the teacher made them run the first day. Sentence4: Gina cried at the end.
Example Output: 2, It was gym.

Example Input: Sentence1: My friend and I decided to start a band and perform for our families. Sentence2: I was singer and my friend played guitar. Sentence3: We practiced in my garage. Sentence4: Eventually, we got pretty good.
Example Output:
5, We performed a small show for our families the next weekend.