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: He was incredibly sleepy. Sentence2: It pulled at his eyes and tempted him to rest his head at his desk. Sentence3: He could feel its power getting stronger and stronger. Sentence4: Relenting, he rose from his desk and closed the door.

When he returned and sat down he fell asleep almost instantly.