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: Doug and Molly decided to go the park to take a walk. Sentence2: While they were there they found a stray dog. Sentence3: They carried the dog back to their apartment. Sentence4: They posted an ad online to try to find the owner.

They never found the owner and kept the dog.