You will be given a definition of a task first, then some input of the task.
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.

Sentence1: Jessica was getting ready to graduate from college. Sentence2: She worked very hard in school and thought she deserved a reward. Sentence3: Her father knew that Jessica wanted a vacation. Sentence4: Jessica was very happy.
Output:
4, On her graduation day, Jessica's father surprised her with tickets.