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: Kyle was sure he did not need to wear a helmet when he rode his bike. Sentence2: One day, he was riding his bike to a friend's house. Sentence3: He wasn't paying attention, and hit a rock. Sentence4: He fell off his bike and got a big bump on his head.

He never forgot to wear a helmet again.