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: Mike bought a new bike to ride in his town. Sentence2: He cycled from his house to a friend's house. Sentence3: On the way he met a group of kids riding bikes as well. Sentence4: Mike accidentally collided with the kids.
Example Output: 4, Neiter Mike nor the kids were wearing helmets at the time.

Example Input: Sentence1: Harry went to the theme park with his family. Sentence2: He then rode on some smaller rides with his mom. Sentence3: The family ate at a restaurant at the park. Sentence4: Harry had a great time at the park.
Example Output: 2, His dad and brother rode on a big roller coaster with him.

Example Input: Sentence1: Francisco is jealous of all his friends who go skiing in the winter. Sentence2: He decides he wants to ski too. Sentence3: He practices very hard. Sentence4: Francisco became a good skier.
Example Output:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
3, Francisco works with an instructor to learn how to ski.

