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: So his friend Tom got him a large case of a rare variety. Sentence2: Tom was excited to give the gift to Rob. Sentence3: Rob opened the gift in disbelief and drew a smile. Sentence4: Rob was happy.
Example Output: 1, Rob like salsa.

Example Input: Sentence1: Keith went to a pet store to see the animals. Sentence2: The store had fish, small animals, and a few puppies. Sentence3: Keith petted a few of the puppies. Sentence4: Keith watched some of the colorful fish.
Example Output: 3, The fish were of all different colors and sizes.

Example Input: Sentence1: Allie lost 50 pounds. Sentence2: If she lost 10 more he would do skin removal. Sentence3: Allie dieted hard and exercised. Sentence4: Allie was able to lose the 10 pounds and have the skin removal.
Example Output:
2, The doctor told her she needed to lose 10 more.