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: Lauren has always wanted to wear skinny jeans to parties. Sentence2: However, she needs to lose weight so the skinny jeans will look good. Sentence3: Finally she has lost enough weight to wear skinny jeans. Sentence4: She wore them proudly to the next party.

SOLUTION: 3, Lauren begins a challenging exercise regimen.

PROBLEM: Sentence1: Rick liked eating chocolate oatmeal. Sentence2: Rick was tight about money. Sentence3: But he decided to buy more expensive cocoa powder just once. Sentence4: The taste was worth the price.

SOLUTION: 2, But his friend suggested that he use higher quality cocoa powder.

PROBLEM: Sentence1: Danny bought a boat. Sentence2: His nearby marina was having a race. Sentence3: Danny and his best friend manned the boat. Sentence4: They prepared for the start of the race.

SOLUTION:
3, He decided to enter.