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: The man moved to Iowa. Sentence2: The man opened the back door of his apartment. Sentence3: He threw out a bucket of water onto the steps. Sentence4: The water turned into a ramp of ice over the back porch.

He guessed it must be thirty degrees below zero outside.