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: Tom was wrapping Christmas presents. Sentence2: But he lost track of who they were for. Sentence3: So he put wrong name tags on the presents. Sentence4: On Christmas, Tom handed his son a present.

His son was bewildered when he unwrapped a dollhouse.