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: Tonight was his very first basketball game. Sentence2: He had practiced and his parents came to watch him. Sentence3: Avery played well with his teammates and even scored some points! Sentence4: Avery's parents were proud.
Example Output: 1, Avery was very excited.

Example Input: Sentence1: Rex missed his high school days of being a gymnast. Sentence2: Now he was afraid he had lost his athletic touch forever. Sentence3: However, a friend encouraged him to try a cartwheel on the beach. Sentence4: Rex did an awesome cartwheel on his first try!
Example Output: 5, He was relieved.

Example Input: Sentence1: His mother agreed, but warned him to be careful. Sentence2: David accidentally knocked over his glass which shattered everywhere. Sentence3: His mother cheerfully forgave David. Sentence4: David promised to be more careful in the future.
Example Output:
1, David asked his mother if he could pour his own drink.