Given the task definition and input, reply with output. 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.

Sentence1: My brother bit into a slice that had a piece of gum on it. Sentence2: Disgusted, we called the pizza place to complain. Sentence3: They came by our house and denied everything. Sentence4: We ordered from another store.

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
1, One Friday night we all pitched in and got a huge pizza.