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: Anna was walking her dog on a sunny day. Sentence2: They passed by another dog who was playing fetch with it's owner. Sentence3: Anna's dog seemed very attracted to the ball. Sentence4: Anna decided to go to the pet store and buy a yellow ball for her dog.

Anna played fetch with her dog and it became their favorite game.