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: My son participated in a cub scout toy car derby. Sentence2: Father and son teams designed small matchbox cars. Sentence3: Some teams designed fancy cars. Sentence4: We designed a simple car, which actually won the derby.

My son was happy that we won.