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: The principal announced there would be a school dance that Friday. Sentence2: Mary became excited about the dance. Sentence3: She wanted Dan to ask her to the school dance. Sentence4: She was happy he asked her to the dance.

SOLUTION: 4, Dan saw Mary in the hallway and told her he needed to talk to her.

PROBLEM: Sentence1: Elaine did not feel like cooking tonight. Sentence2: Therefore, Elaine decided that she would go out to eat. Sentence3: Elaine deliberated on where she should go for almost an hour. Sentence4: Elaine found it difficult to make up her mind.

SOLUTION: 3, However, Elaine did not know where she wanted to eat.

PROBLEM: Sentence1: Ben walked along the street and found the end of a length of string. Sentence2: He picked it up and pulled on it. Sentence3: Ben followed the string to see where it went. Sentence4: Ben was fascinated by the string.

SOLUTION:
3, More string came but not the end.