Definition: In this task, you're given five sentences, numbered 1 through 5. Your job is to generate a title for the story that makes complete sense. The title must be short, with less than three words, use simple language, and include the main topic of the story.
Input: Sentence 1: Timmy was afraid of the neighbors dog. Sentence 2: He thought he saw it every night, black with red eyes. Sentence 3: His parents one day told him to go to his neighbor's house. Sentence 4: Shaking with fear, he went, and met the dog. Sentence 5: Now he walks his neighbor's dog every morning.

The big dog.