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.

Ex Input:
Sentence1: Dan wanted to find the perfect gift for his mother's birthday. Sentence2: He shopped at the mall for hours and was unable to find anything. Sentence3: His mother saw his face when he walked in and asked what was wrong. Sentence4: Dan explained the situation and his mother was not upset.

Ex Output:
3, He came home disappointed and without a gift.

Ex Input:
Sentence1: Chuck always wanted to join the debate team at school. Sentence2: He took a speech class over the summer to help. Sentence3: As soon as the school year started he signed up for the team. Sentence4: Chuck joined and did fairly well.

Ex Output:
2, He has great ideas to debate with but he is scared of public speaking.

Ex Input:
Sentence1: Charles was happy to meet a record company executive on Facebook. Sentence2: Charles asked to write about the executive's artist. Sentence3: The executive said yes, as long as the story was published. Sentence4: Vibe Magazine offered to publish the story on speculation.

Ex Output:
5, It was the beginning of a fruitful relationship for Charles.