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: Bob's parents had sent him some birthday presents in the mail. Sentence2: He was excited to open them up after work. Sentence3: His mother had sent him a brand new RC car. Sentence4: Bob was so elated!

Bob played with his new RC car for hours afterwards.