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: After getting off the school bus, I realized that my phone is missing. Sentence2: The customer service representative did it for me. Sentence3: In addition, he said that there was a call made to Jamaica. Sentence4: I knew someone had stolen it.

SOLUTION: 2, Since there was service on it, I decided to cancel it.

PROBLEM: Sentence1: Pam's house was where the party was. Sentence2: Pam bought a cake. Sentence3: Everyone danced and had fun! Sentence4: Pam was a good hostess.

SOLUTION: 2, Everyone bought gifts.

PROBLEM: Sentence1: Tom and Cindy were eating marshmallows. Sentence2: But Tom began to get tired of it. Sentence3: And Tom agreed with her suggestion. Sentence4: Tom enjoyed the roasted marshmallows.

SOLUTION:
3, Cindy suggested roasting the marshmallows.