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: A boy needed to learn to drive. Sentence2: He asked his father and he said yes. Sentence3: They began to look for a first car. Sentence4: In the newspaper ads, they found a nice looking car.

SOLUTION: 5, They bought the car.

PROBLEM: Sentence1: Sandy had purchased a new bed. Sentence2: She also needed to get rid of her old bed. Sentence3: Her friend Jim wanted her old bed. Sentence4: Sandy sold Jim her old bed.

SOLUTION: 2, She needed to clean her room before the delivery men arrived.

PROBLEM: Sentence1: Bella sat by the campfire with her friends. Sentence2: They all had s'mores dangling over the fire, warming up. Sentence3: Each one of them took turns telling a scary story. Sentence4: When it was her turn she made sure to put her best acting to use.

SOLUTION:
5, Bella's friends were very frightened by her story.