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: Andy had always wanted a big kids bike. Sentence2: When he turned six Year's old he asked for a bike for his birthday. Sentence3: He did not know how to ride a bike. Sentence4: On Andy's birthday his mother gave him a bike.

His dad taught him how to ride it.