Detailed Instructions: 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.
Q: Sentence1: They wanted to go inside. Sentence2: But the librarian was not in in the library. Sentence3: The girls weren't sure where she could be. Sentence4: They decided to wait for her.
A:
1, Gina and her friends were outside of the school library.