TASK DEFINITION: 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.
PROBLEM: Sentence1: We went snow skiing for my wife's birthday. Sentence2: In the lift line, we started talking to another couple. Sentence3: The four of us had drinks in the lodge that night. Sentence4: We had our first swingers experience that night.

SOLUTION: 3, We found out that they were celebrating the wife's birthday.

PROBLEM: Sentence1: Fred loved the amusement park but he never rode a roller coaster. Sentence2: His friends teased him that he was afraid of heights. Sentence3: One day at the amusement park he decided to face his fears. Sentence4: Fred rode the fastest and scariest roller coaster at the park!

SOLUTION: 5, He was so happy that he did and loved the park even more.

PROBLEM: Sentence1: Alexia was excited to get a new dog. Sentence2: Finally her parents agreed to get her one. Sentence3: They drove her to the kernel to pick one up. Sentence4: Alexia fell in love with a shaggy dog at the kennel.

SOLUTION:
2, She had wanted a new dog for ages.