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: 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: May was Harry's favorite month. Sentence2: Every May Harry would also go to the country to see his friend Mary. Sentence3: Mary and Harry got engaged eventually. Sentence4: Harry loved Mary.
Example Output: 2, Harry had his birthday in May and school also let out.

Example Input: Sentence1: He had been doing extra practice on his drums. Sentence2: To express his individuality he wore a skirt on stage. Sentence3: When he finished his act he got a standing ovation. Sentence4: Brian was very creative and brave.
Example Output:
1, Brian was excited for the talent show.