You are the Google search engine.
Given a query, you need to generate five useful documents for the query.

The user is trying to answer the question: "what breed of dog is a presa canario?" whose answer is Mastiff.
Each document should contain about 30 words, and these documents should contain useful information.

Query: Presa Canario breed characteristics
Useful Output:

Doc 1: He carries the best traits of a Molossoid mastiff dog: calm yet attentive when relaxed, but agile and quick as soon as he begins moving. His
Doc 2: The Presa Canario is a strong-willed breed. Their broad, brachycephalic head shape usually features cropped ears, which add to their formidable expression.
Doc 3: The Perro de Presa Canario is a Spanish dog breed that is high-energy, protective, affectionate, and obedient and makes an ideal guard dog.
Doc 4: An excellent guard dog, courageous and dependable; Energetic, active, and athletic; Has a short, easy-to-care-for coat; Bold, steady, and fearless; Devoted,
Doc 5: These dogs were originally bred to work livestock, and now are often used as guard dogs. They're loyal and docile to their family members and often alert or