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: Rex missed his high school days of being a gymnast. Sentence2: Now he was afraid he had lost his athletic touch forever. Sentence3: However, a friend encouraged him to try a cartwheel on the beach. Sentence4: Rex did an awesome cartwheel on his first try!
Example Output: 5, He was relieved.

Example Input: Sentence1: Sam hopped into his mail truck and drove off. Sentence2: He drove so fast he didn't see a pothole in the road. Sentence3: The truck bounced hard when he hit the pothole. Sentence4: Sam's head hit the steering wheel.
Example Output: 2, He was trying to do his route fast to get home early today.

Example Input: Sentence1: A boy saw a quarter lying on the sidewalk. Sentence2: He bent down and picked it up. Sentence3: As he did so, a spitball flew where his head had been. Sentence4: The boy was angry.
Example Output:
4, Looking around, he saw his archenemy holding a straw.