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: Sean and Sara had just gone on a date. Sentence2: They were both nervous as they said goodbye. Sentence3: Suddenly, Sean leaned over and hugged Sara. Sentence4: Sara was caught off guard and didn't  know what to say.

Before she could react, he walked away.