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: Rich and his friends went to see Garth Brooks in concert. Sentence2: There were so many people at the concert. Sentence3: They got some drinks and found their seats. Sentence4: Rich sang along to every song.

He thought it was the best concert ever.