Definition: In this task, you're given a four sentences of story written in natural language. Your job is to complete end part of the story by predicting appropriate last sentence which is coherent with the given sentences.
Input: Sentence1: Gina and her friends were outside of the school library. Sentence2: They wanted to go inside. Sentence3: But the librarian was not in in the library. Sentence4: The girls weren't sure where she could be.

They decided to wait for her.