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: Bob decided to go for a walk at the park. Sentence2: Bob walked along the path and admired the scenery. Sentence3: He found a twenty dollar bill on the ground. Sentence4: He was happy.

Ex Output:
1, It was a beautiful summer day outside.

Ex Input:
Sentence1: A man named Pete got off of work. Sentence2: After work, he drove to the gym. Sentence3: He went into the gym and found a workout machine. Sentence4: While working out, Pete worked up a sweat.

Ex Output:
5, He showered after he finished working out.

Ex Input:
Sentence1: Anna had a saltwater fish tank. Sentence2: She only kept coral in it. Sentence3: Then she decided she wanted some fish, too. Sentence4: Now Anna has a diverse tank with fish and coral.

Ex Output:
4, She bought a few small clownfish and triggers.