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: George decided to surprise his father as a birthday present. Sentence2: He bought two tickets to his father's favorite football team. Sentence3: On the day, George blindfolded his father and drove for a long time. Sentence4: George's father had no idea where they were going.

When they reached the stadium, George's father was so excited!