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: When I was 15, I had an imaginary friend. Sentence2: My imaginary friend was named Jeff. Sentence3: Jeff was always with me, even if he was imaginary. Sentence4: When I was 16, I no longer needed an imaginary friend.

Jeff left my life and I haven't seen him since.