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: John wanted pizza, but he was broke. Sentence2: Then he remembered he had won a free pizza last week! Sentence3: They sent him his free pizza an hour later. Sentence4: John devoured his pizza.

SOLUTION: 3, He called the pizza place and gave them his code.

PROBLEM: Sentence1: Paul wanted to buy his wife a gift. Sentence2: Unfortunately he couldn't decide what to get. Sentence3: Eventually it was his wife's birthday. Sentence4: So he gave her cash.

SOLUTION: 3, He fretted over it for days.

PROBLEM: Sentence1: Kelly was skiing when suddenly she heard a large commotion behind her. Sentence2: She looked back and saw a wall of snow coming towards her. Sentence3: As the avalanche caught up to her she quickly jumped into some trees. Sentence4: Kelly grabbed a tree and hung on tight.

SOLUTION:
3, She panicked and started skiing faster down the slope.