Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Sentence1: She was about to find out the sex of her baby. Sentence2: She was really hoping for a boy! Sentence3: She held her breath as the doctor scanned her belly. Sentence4: Her doctor confirmed it was a boy!
Student:
1, Ellen was at her doctor's office.