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 shepherd opened the gate of the pen. Sentence2: He sent his dog into the pasture to round up the sheep. Sentence3: The dog herded the sheep towards the gate. Sentence4: The sheep moved together into the pen.

The shepherd then went back to his house.