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: Ken was on vacation in the tropics. Sentence2: He was learning to scuba dive. Sentence3: He passed his certification course and then dived every day. Sentence4: Soon he was learning lots of facts about the ocean and exploring.

It was the best vacation Ken had ever taken.