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: Rob like salsa. Sentence2: So his friend Tom got him a large case of a rare variety. Sentence3: Tom was excited to give the gift to Rob. Sentence4: Rob opened the gift in disbelief and drew a smile.

Rob was happy.