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: My birthday was yesterday. Sentence2: To my surprise my friends planned a party for me. Sentence3: I could not believe it. Sentence4: The party was very fun.

It was the best birthday party ever.