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: Leeza was walking alone near the woods. Sentence2: She suddenly fell and was unable to walk. Sentence3: She screamed for help, to no avail. Sentence4: Leeza was in pain.
Example Output: 4, She crawled to the street to flag someone down.

Example Input: Sentence1: Then, his friend told him that plastic is bad for the environment. Sentence2: Bob decided to forego his plastic bags. Sentence3: Bob invested in some reuseable grocery bags. Sentence4: Bob used his reusable grocery bags to go shopping.
Example Output: 1, Bob used plastic grocery bags to go shopping.

Example Input: Sentence1: He looked across the pond and spied a fly. Sentence2: The frog swam up to the fly quietly. Sentence3: Unfortunately, the fly saw him coming and buzzed away. Sentence4: The frog was still hungry.
Example Output:
1, A frog was hungry for a late dinner.