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: Cal was half-awake as he stumbled into his kitchen. Sentence2: He'd started a pot of coffee which was now done. Sentence3: Cal poured himself a bowl of cereal. Sentence4: He then poured coffee on top of it.

Cal didn't realize what he'd done until he slurped the first spoonful.