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: Mary needed to have teeth pulled. Sentence2: She wanted the dentist to put her to sleep. Sentence3: All he could do was numb the area with Novocaine. Sentence4: Mary stared at him in horror.

After seeing her expression, the dentist was able help Mary.