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: 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: Fancy turned 14 Year's old yesterday. Sentence2: Schnauzers usually don't live that long. Sentence3: Sharon feels lucky to have had Fancy since she was a puppy. Sentence4: Sharon knew her time with Fancy was short.
Example Output: 1, Fancy is the name of Sharon's miniature schnauzer.

Example Input: Sentence1: Gordon bought his son a remote control car for Christmas. Sentence2: But he realized that it needed AA batteries. Sentence3: Gordon could not find any. Sentence4: He bought a big package of AA batteries.
Example Output:
4, So the next day, he went to the toy store where he bought the car.