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: Dave loved the outdoors. Sentence2: One day he decided to go on a hike. Sentence3: As he walking on the trail, he heard a hissing sound. Sentence4: To his right on the ground was a rattle snake!

Dave backed away slowly.