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: Marcus was just starting his first flying lesson. Sentence2: He was learning to fly small commuter planes. Sentence3: He was nervous to take the plane up in the air. Sentence4: His instructor helped him take off from the airport.

Marcus relaxed once they were in the air.