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 was stargazing one night. Sentence2: Suddenly he sat bolt upright. Sentence3: He saw a twinkling, moving star! Sentence4: He ran to show it to his dad.

His dad laughed because the star was really a jet with lights.