Question: Which dog is larger,the Tibetan Mastiff or the Boston Terrier?
Context: Jesse Evan Freidin (born 1981, in Boston, MA) is a fine art dog photographer using traditional film-based processes.  He is best known for creating a series of photos of dogs dressed in costumes like those worn by Lady Gaga.  This 'Doggie Gaga Project' was an overnight international media sensation and was linked online on hundreds of sites including Entertainment Weekly, MTV, TMZ, and The Sundance Channel.  The project was also featured on ABC’s Live!  With Regis & Kelly.  Freidin was awarded Beast of the Bay's Best Dog Photographer in the Bay Area 2010 for his fine art pet portraiture.  He is a supporter of the San Francisco Bay Area dog community, donating his time and resources to animal rescue groups and non-profits such as Bay Area Dog Lovers Responsible About Pit Bulls (Bad Rap) and Rocket Dog Rescue, as well as various educational endeavors.  He lives in San Francisco with his best friend, Pancake (a 4 year old Boston Terrier). Rhett is the official costumed mascot of the Boston University (BU) and the Boston University Academy (BUA) Terriers.  The Boston Terrier has been the BU mascot since 1922.  The often snarling, bi-pedal black and white Boston Terrier was later named after the male lead in Margaret Mitchell's "Gone with the Wind", because "No one loves Scarlett more than Rhett" referencing Rhett Butler's affection for Scarlett O'Hara (scarlet is BU's primary color).  In recent years Rhett has frequented Boston University games, events, and dining halls wearing his scarlet and white double-zero hockey jersey.  Other outfits include a basketball jersey and a referee uniform (typically worn during the short youth hockey games that take place during ice hockey intermissions).  However, he is also known to enjoy wearing his scarlet superhero cape when the occasion presents itself.  Like all mascots, Rhett and the Terrier logo are ubiquitous at athletic events.  The Terriers play varsity Division I intercollegiate sports in ten men's and twelve women's programs.  Rhett's nemesis is Baldwin, the Boston College eagle. The Teddy Roosevelt Terrier is a small to medium-sized American hunting terrier.  Lower-set with shorter legs, more muscular, and heavier bone density than its cousin the American Rat Terrier.  There is much diversity in the history of the Teddy Roosevelt Terrier breed and it shares a common early history with the American Rat Terrier, Fox Paulistinha and Tenterfield Terrier.  It is said the Rat Terrier background stems from the terriers or other dogs that were brought over by early English and other working class immigrants.  Since the breed was a farm, hunting and utility dog there was little to no planned breeding other than breeding dogs with agreeable traits to each other in order to produce the desired work ethic in the dog.  It is assumed that the Feist (dog), Bull Terrier, Smooth Fox Terrier, Manchester Terrier, Whippet, Italian Greyhound, the now extinct English White Terrier, Turnspit dog and or Wry Legged Terrier all share in the Teddy Roosevelt Terrier's ancestry.  These early Ratting Terriers were then most likely bred to the Beagle or Beagle cross bred dogs (for increased scenting ability) and other dogs.  Maximizing the influences from these various breeds provides the modern Teddy Roosevelt Terrier with a keen sense of awareness and prey drive, an acute sense of smell and a very high intellect.  Although they tend to be aloof with strangers they are devoted companion dogs with a strong desire to please and be near their owners side at all times. Lucky and Squash is an 2012 American children's book written by Jeanne Birdsall and illustrated with watercolor paintings by Jane Dyer published by Harper.  The two eponymous characters are dogs based on Birdsall's and Dyer's actual dogs, Cagney and Scuppers, a Boston Terrier and a Tibetan Terrier respectively. The Tibetan Dog (; Japanese: チベット犬物語 ～金色のドージェ～ ) is a 2011 Chinese/Japanese animated film directed by Masayuki Kojima, co-produced by Madhouse, China Film Group Corporation and Ciwen Pictures.  It premiered at 51st Annecy Film Festival in June 2011.  In this film, a young boy named Tenzing leaves for Tibet after his mother passes away to live with his father in the prairies and encounters a true friend in form of a golden Tibetan Mastiff. Mastiff type means a large molosser dog.  The term "mastiff type" has been used synonymously with the term "molosser".  For example, the bulldog breeds, the Great Dane, the mountain dogs, the pit bulls and even smaller dogs such as the Boston terrier, may be considered "mastiff types" in this broad sense.  The descriptive term, mastiff type, should not be confused with the breed, the Mastiff.  All breeds are individual and should be referred to by their breed name to ensure correct identification. Rock Dog ( literally "Rock and Roll Tibetan Mastiff") is a 2016 computer-animated comedy film produced by Mandoo Pictures and Huayi Brothers.  The film is directed by Ash Brannon, written by Brannon and Kurt Voelker, based on the Chinese graphic novel "Tibetan Rock Dog" by Zheng Jun.  It features the voices of Luke Wilson, Eddie Izzard, J. K. Simmons, Lewis Black, Kenan Thompson, Mae Whitman, Jorge Garcia, Matt Dillon and Sam Elliott.  The film follows a young Tibetan Mastiff who leaves his home village in the mountains to become a rock musician in the big city after a radio falls from the sky. The Tibetan Mastiff is a large Tibetan dog breed ("Canis lupus familiaris").  Originating with the nomadic cultures of Tibet, China, India, Mongolia and Nepal, it's used by local tribes of Tibetan to protect sheep from wolves, leopards, bears, large mustelids, and tigers. The Himalayan Sheepdog, also referred to as the Bhote Kukur or Bhotia, is a livestock guardian dog that originated from Nepal.  This mountain dog breed is closely similar to Indian Mastiff and the Tibetan Mastiff and may be related to the long-haired Kinnaur Sheepdog of Tibet.  Naturally, Himalayan Sheepdogs enjoy outdoor lifestyles and are rarely seen beyond the regions of India and Nepal.  As a powerful and robust breed, the Himalayan Sheepdog is mainly used for herding purposes.  The Himalayan Sheepdog is regionally popular as both a loyal companion as well as a working dog. The Boston Terrier is a breed of dog originating in the United States.  This "American Gentleman" was accepted in 1893 by the American Kennel Club as a non-sporting breed.  Color and markings are important when distinguishing this breed to the AKC standard.  They should be either black, brindle or seal with white markings.  Bostons are small and compact with a short tail and erect ears.  The AKC says they are highly intelligent and very easily trained.  They are friendly and can be stubborn at times.  The average life span of a Boston is around 11 to 13 years, though some can live well into their teens.
Answer: Tibetan Mastiff