Given the task definition and input, reply with output. 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: Tom noticed that his porch had become very dusty. Sentence2: He tried convincing his son to sweep it, but his son refused. Sentence3: Finally Tom realized that he needed to sweep the porch himself. Sentence4: He found a broom and swept the porch meticulously.
Tom was happy to see the porch wasn't dusty any longer.