Question: Which dog breed is extinct, Japanese Chin or Tahltan Bear Dog?

full_context: Document 1: Shikoku (dog): The Shikoku (四国犬 , Shikoku-ken , alternative names: Kochi-ken, Mikawa Inu, Japanese Wolfdog) is a native, primitive Japanese breed of dog from Shikoku island that is similar to a Shiba Inu. The Shikoku was recently added as recognized breed of the American Kennel Club as an AKC FSS standard [ Foundation Stock Service ], it is recognized by the Japan Kennel Club, an organization recognized by AKC as an official foreign registry (AKC recognizes the Shiba Inu, however). The Shikoku is also in the Canadian Kennel Club Hound group and the United Kennel Club, awaiting full recognition. In 1937 the Japanese Crown recognized the Shikoku dog as a living "natural monument" of Japan.
Document 2: Shar Pei: The Chinese Shar-Pei, is a breed of dog known for its distinctive features of deep wrinkles and a blue-black tongue. The breed originates from Canton, China. The English name (沙皮, pinyin: "shā pí"; probably derived from British spelling of the Cantonese equivalent, "sā pèih") translates to "sand skin" and refers to the texture of its short, rough coat. As puppies, Shar Pei have numerous wrinkles, but as they mature, these loosen and spread out as they "grow into their skin". Shar Pei were named in 1978 as one of the world's rarest dog breeds by "TIME" magazine and the "Guinness World Records". Although the Shar Pei has been identified as a basal breed that predates the emergence of the modern breeds in the 19th century, the American Kennel Club did not recognize it as a breed until 1992.
Document 3: Alpine Spaniel: The Alpine Spaniel is an extinct breed of dog which was used in mountain rescues by the Augustinian Canons, who run hospices in the region around the Great St. Bernard Pass. The spaniel was a large dog notable for its thick curly coat. One of the most famous specimens of the Alpine Spaniel is Barry, however his preserved body has been modified on more than one occasion to fit with descriptions of the extinct breed from earlier time periods. Due to the conditions in the Alps, and a series of accidents, extinction was discussed as a possibility by authors during the 1830s, and at some point prior to 1847 the entire breed was reduced to a single example due to disease. Evidence held at the Natural History Museum in Bern show that two distinct breeds of dog were being used in the area during this time period. The breed is thought to be the predecessor to the modern St. Bernard and the Clumber Spaniel.
Document 4: Japanese Spitz: The Japanese Spitz (日本スピッツ , Nihon Supittsu ) is a small to medium breed of dog of the Spitz type. The Japanese Spitz is a companion dog and pet. There are varying standards around the world as to the ideal size of the breed, but they are always larger than their smaller cousins, the Pomeranian. They were developed in Japan in the 1920s and 1930s by breeding a number of other Spitz type dog breeds together. They are recognized by the vast majority of the major kennel clubs, except the American Kennel Club due to it being similar appearance to the white Pomeranian dog, American Eskimo Dog and Samoyed Dog. While they are a relatively new breed, they are becoming widely popular due to their favorable temperament and other features.
Document 5: Tahltan Bear Dog: The Tahltan Bear Dog was a breed of dog that was indigenous to Canada. This breed is believed to be extinct by most authorities.
Document 6: Pekingese: The Pekingese (also known as the Lion Dog, Peking Lion Dog, Pelchie Dog, or Peke) is an ancient breed of toy dog, originating in China. They are called Lion Dogs due to their resemblance to Chinese guardian lions (the Shih Tzu is also known as a Lion Dog in Chinese).
Document 7: Tamaskan Dog: The Tamaskan dogs are a crossbreed, specifically designed by dog fanciers, beginning in Finland, to morphologically resemble a wolfdog. It is a cross of several standardized breeds of the sled dog type like the Siberian Husky and the Alaskan Malamute, and its bloodlines may sometimes include a small amount of wolfdog stock. s of 2013, Tamaskans have not been recognized as a breed in its own right by any major breed registries or kennel clubs, only being recognized by two minor registries, the American Rare Breed Association, and the related Kennel Club of the United States of America, and by Tamaskan-specific breeder clubs. It is a highly versatile dog that can excel in agility, obedience and working trials. Although there are a little over 600 Tamaskans worldwide registered in these organizations, increasing interest has resulted in their spread throughout continental Europe, the UK, United States, Canada, and Australia.
Document 8: Karelian Bear Dog: The Karelian Bear Dog (KBD) is a Finnish or Karelian breed of dog. In its home country, it is regarded as a national treasure. KBD will hunt a variety of animals. Its quick reflexes and fearless nature have made it very popular for hunting aggressive game, including bears, moose, and wild boar. It was the breed's ability to hunt and offer protection against a bear that earned the breed its name.
Document 9: Alaunt: The Alaunt is an extinct breed of dog, with the original breed having existed in central Asia and Europe from ancient times through the 17th century. The Alaunt breed had three distinct phenotypes: Alaunt Veantre, Alaunt Boucherie and the Alaunt Gentile. They all were large, short coated dogs of varying head-types. The former two resembled the molosser type dogs much like the present-day Dogo Argentino or like the Caucasian Shepherd Dog except with short hair and a mesocephalic head which made them excellent large-game hunters. The Alaunt was originally bred by the Alani tribes, the nomads of Indo-European Sarmatian ancestry who spoke an Iranian language. The Alans were known as superb warriors, herdsmen, and breeders of horses and dogs. The Alans bred their dogs for work and developed different strains within the breed for specific duties. The breed was further developed in Spain, France, Germany, England, and in Italy.
Document 10: Chinese Imperial Dog: The Chinese Imperial Dog is a Toy dog breed with a wrinkly, short-muzzled face, and curled tail. Kennel clubs originally classified the breed under the shih-tzu, before recognizing the Imperial as a separate breed. Other names for the Chinese Imperial Dog include: Imperial Shih Tzu, Lion Dog, Micro Shih Tzu, Miniature Shih Tzu, Princess-type Shih Tzu, Tiny Teacup Shih Tzu, Tiny Toy Shih Tzu.
Document 11: Shih Tzu: A Shih Tzu (English: ; ), also known as the Chrysanthemum Dog, is a toy dog breed, weighing 10–19 pounds (4.5–8.6kg) when fully grown. The exact origins of the breed are unknown, but it is thought to have originated in Tibet and then been developed in China.
Document 12: Hare Indian Dog: The Hare Indian dog is an extinct domesticated canine; possibly a breed of domestic dog, coydog, or domesticated coyote; formerly found and originally bred in northern Canada by the Hare Indians for coursing. It had the speed and some characteristics of the coyote, but the domesticated temperament and other characteristics of a domestic dog. It gradually lost its usefulness as aboriginal hunting methods declined, and became extinct or lost its separate identity through interbreeding with dogs in the 19th century.
Document 13: St. John's water dog: The St. John's water dog, also known as the St. John’s dog or the lesser Newfoundland, was a landrace (a dog bred for a purpose, not pedigree or appearance) of domestic dog from Newfoundland. Little is known of the types that went into its genetic makeup, although it was probably a random-bred mix of old English, Irish and Portuguese working dogs. The number of St. John's water dogs started declining by the start of the 20th century. By the early 1980s, the variety was extinct.
Document 14: Shiba Inu: The Shiba Inu (柴犬 ) is the smallest of the six original and distinct spitz breeds of dog from Japan.
Document 15: Japanese Chin: The Japanese Chin (Japanese: 狆, "chin"), also known as the Japanese Spaniel, is a dog acknowledged for its importance to Japanese nobility. It is also known for its strabismus of the eyes. Being both a lap dog and a companion dog, this toy breed has a distinctive heritage.
ground_truth: Tahltan Bear Dog