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.

Example Input: Sentence1: Jason decides that he wants to learn Hindi before the wedding. Sentence2: He hires a tutor and practices speaking Hindi every day. Sentence3: When the wedding day arrives, Jason is fluent in Hindi! Sentence4: Everyone was impressed that Jason had become bilingual.
Example Output: 1, Jason's best friend is getting married in India next year.

Example Input: Sentence1: Celina is very old. Sentence2: Her hips are always sore. Sentence3: It is hard for her to walk. Sentence4: It helped her a lot.
Example Output: 4, One day, she obtained a walker.

Example Input: Sentence1: Yesterday I went to the animal shelter. Sentence2: I have been in search of the perfect dog for my family. Sentence3: I fell in love with a dog named Toby. Sentence4: My family all loved Toby.
Example Output:
4, After introducing him to my cat we decided to take him home.