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.
Q: Sentence1: Nick took his dog for a walk last Saturday. Sentence2: During the walk, his dog saw several other dogs. Sentence3: He was not well-socialized, so he started barking at them. Sentence4: It was a long and painful experience for both of them.
A:
Nick decided to take his dog to a trainer.