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: Jack was a marine. Sentence2: He was deployed to a foreign country to keep the peace. Sentence3: One day a fellow soldier was asking him about his decision to join up. Sentence4: Jack said his father was a marine, as was his grandfather.

Jack believed it was what the men in his family were supposed to do.