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: Tom loved dogs. Sentence 2: Tom wanted to own a dog. Sentence 3: Tom researched every type of dog. Sentence 4: Tom decided the Chihuahua was his favorite. Sentence 5: Tom bought a Chihuahua dog.

Dog