Given the task definition and input, reply with output. 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.

Sentence1: My daughter had been begging for a pet. Sentence2: Her birthday was coming up. Sentence3: I visited the pet store to do some research. Sentence4: The workers helped me make a decision.
I bought her a dog.