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: Cathy and her family visited the pet store on adoption day. Sentence2: Cathy fell in love with May as soon as she saw her. Sentence3: After applying to adopt May and being approved, Cathy adopted May. Sentence4: May and Cathy got along greatly.
Example Output: 1, May was a shelter cat the pet store took in for adoption day.

Example Input: Sentence1: She drove out to meet them at a restaurant. Sentence2: Her friends were waiting at a table but had already ordered. Sentence3: By the time she had her food, they were already done eating. Sentence4: Alice felt her friends were slightly thoughtless.
Example Output: 1, Alice's friends invited her out to lunch.

Example Input: Sentence1: Gina liked to volunteer at a homeless shelter. Sentence2: She had spent Years going there for many hours a week. Sentence3: The staff decided to do something to show their appreciation. Sentence4: Gina was so touched she cried when they gave it to her.
Example Output:
4, They chipped in and got Gina a gift.