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: Anna had a saltwater fish tank. Sentence2: Then she decided she wanted some fish, too. Sentence3: She bought a few small clownfish and triggers. Sentence4: Now Anna has a diverse tank with fish and coral.

SOLUTION: 2, She only kept coral in it.

PROBLEM: Sentence1: Karen was a softball player. Sentence2: Her team wasn't doing very well. Sentence3: Her coach gave them a very inspiring speech. Sentence4: Karen improved with the team.

SOLUTION: 4, Everyone started to practice and work much harder.

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: They bought the car.

SOLUTION:
4, In the newspaper ads, they found a nice looking car.