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.

Sentence1: Orson was a great baseball player. Sentence2: He had been in the game for over twenty years. Sentence3: He noticed his body giving out more and more. Sentence4: He wondered if he could keep up with the times.
Orson decided to retire.