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: Sam went to the beach to look at the ocean. Sentence2: But he noticed that he was the only alone. Sentence3: He began to feel sad. Sentence4: Sam sadly continued to watch the ocean.

But then he noticed someone sit next to him.