Information:  - Fur is used in reference to the hair of animals, usually mammals, particularly those with extensive body hair coverage that is generally soft and thick, as opposed to the stiffer bristles on most pigs. The term "pelage" first known use in English c. 1828(French, from Middle French, from "poil" hair, from Old French "peilss", from Latin "pilus",) is sometimes used to refer to the body hair of an animal as a complete coat. "Fur" is also used to refer to animal pelts which have been processed into leather with the hair still attached. The words "fur" or "furry" are also used, more casually, to refer to hair-like growths or formations, particularly when the subject being referred to exhibits a dense coat of fine, soft "hairs." If layered, rather than grown as a single coat, it may consist of short down hairs, long guard hairs, and, in some cases, medium awn hairs. Mammals with reduced amounts of fur are often called "naked", as with the naked mole-rat, or "hairless", as with hairless dogs.  - The Russian Blue is a cat breed that comes in colors varying from a light shimmering silver to a darker, slate grey. They develop close bonds with their owners and are sought out as pets due to their personalities, beauty and coat. It is their short, dense coat which has been the hallmark of the Russian breed for more than a century. The dense coat stands out from the body and you can draw patterns in the coat that will stay until you smooth them out again.  - The Russian White , Russian Black , and Russian Tabby are breeds of cat created in 1971 , derived from the Russian Blue . The Black and Tabby Russians came from the original mating which created the Russian White . It is appropriate to consider their origins first .  - The domestic cat is a small, typically furry, carnivorous mammal. They are often called house cats when kept as indoor pets or simply cats when there is no need to distinguish them from other felids and felines. Cats are often valued by humans for companionship and for their ability to hunt vermin. There are more than 70 cat breeds, though different associations proclaim different numbers according to their standards.  - A pet or companion animal is an animal kept primarily for a person's company or protection, as opposed to working animals, sport animals, livestock, and laboratory animals, which are kept primarily for performance, agricultural value, or research. The most popular pets are noted for their attractive appearances and their loyal or playful personalities.  - Russia (from the  Rus'), also officially known as the Russian Federation, is a country in Eurasia. At , Russia is the largest country in the world by surface area, covering more than one-eighth of the Earth's inhabited land area, and the ninth most populous, with over 140 million people at the end of March 2016. The European western part of the country is much more populated and urbanised than the eastern, about 77% of the population live in European Russia. Russia's capital Moscow is one of the largest cities in the world, other major urban centers include Saint Petersburg, Novosibirsk, Yekaterinburg, Nizhny Novgorod and Samara.  - Mammals are any vertebrates within the class Mammalia (from Latin "mamma" "breast"), a clade of endothermic amniotes distinguished from reptiles and birds by the possession of a neocortex (a region of the brain), hair, three middle ear bones and mammary glands. The sister group of mammals may be the extinct "Haldanodon." The mammals represent the only living Synapsida, which together with the Sauropsida form the Amniota clade. The mammals consist of the Yinotheria including monotrema and the Theriiformes including the theria.    After reading the paragraphs above, we are interested in knowing the entity with which 'russian white' exhibits the relationship of 'instance of'. Find the answer from the choices below.  Choices: - animal  - cat  - cat breed  - class  - coat  - company  - country  - extinct  - federation  - fine  - fur  - group  - house  - humans  - laboratory  - march  - may  - people  - person  - reference  - region  - research  - surface  - three  - value
A:
cat breed