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 woke up at 10 am and looked outside. Sentence2: She went back to sleep when she saw the sky was gray. Sentence3: 2 hours later she woke up. Sentence4: She walked passed the windows in the living room.

She froze in her tracks when she realized everything was white.