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: Then, his friend told him that plastic is bad for the environment. Sentence2: Bob decided to forego his plastic bags. Sentence3: Bob invested in some reuseable grocery bags. Sentence4: Bob used his reusable grocery bags to go shopping.
Example Output: 1, Bob used plastic grocery bags to go shopping.

Example Input: Sentence1: Meg couldn't find her favorite gold earrings. Sentence2: She was beginning to suspect the new maid had stolen them! Sentence3: Her husband admonished her to search the house more carefully. Sentence4: Meg checked the vacuum and then found them.
Example Output: 4, Meg realized that perhaps they had been vacuumed up by mistake!

Example Input: Sentence1: Timmy was competing in the 3 point competition at his school. Sentence2: The winner would have a chance to win a $1000 college scholarship. Sentence3: He was ready when the day of the competition arrived. Sentence4: Timmy won the competition.
Example Output:
3, Timmy practiced shooting 3 pointers all weekend.