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 kind of animal is represented by a bogle, or mythical beast called a Barghest, in Northumbrian mythology?" whose answer is dog.
Each document should contain about 30 words, and these documents should contain useful information.

Query: what kind of animal is a Barghest in Northumbrian mythology
Useful Output:

Doc 1: A demonic black hound, the size of a yearling calf with eyes the colour of hell fire, haunting the dark, lonely moors and lanes of England.
Doc 2: The Barghest or Barguest is a mythical monstrous black dog with large teeth and claws, though in other cases the name can refer to a ghost or household elf.
Doc 3: The Barghest is a fiend that is attached to a particular place, more often than not an isolated piece of land, a wooded area, cloughs or wasteland.
Doc 4: The barghest is but one example of a common motif in folklore, that of the Black Dog, sometimes ghostly but generally associated with death.
Doc 5: It is often depicted as a giant, canine-like creature with a wolf's head and wings. The origins of the barghest are unknown, but it is thought