Question: Which dog is bigger, the Neapolitan Mastiff or the Bedlington Terrier?
Related documents: [0]  [DOC] The Neapolitan Mastiff or Mastino (Italian: "Mastino Napoletano" ) is a large, ancient dog breed. This massive breed is often used as a guard and defender of family and property due to their protective instincts and their fearsome appearance. [END] 
[1]  [DOC] The Bedlington Terrier is a breed of small dog named after the mining town of Bedlington, Northumberland in North East England. Originally bred to hunt vermin in mines, the Bedlington Terrier has since been used in dog racing, numerous dog sports, as well as in conformation shows and as a companion dog. It is closely related to the Dandie Dinmont Terrier, Whippet and Otterhound. [END] 
Answer: 
Neapolitan Mastiff
Neapolitan Mastiff