There are more than 75 breeds of Canidae Canis familiaris (dog) capable of seriously injuring or killing adult humans--including the supposedly gentle labrador and golden retrievers, most of the shepherd and mastiff breeds, dobermans, rotties, boxers, large hound groups such as Walkers, Black and Tans, and Blueticks; and practically all of the working and sporting groups. So-called PBTs are blamed for attacks mostly because they are "hot news" items, but in a lot of the cases it wasn't a so-called PBT that committed the deed. My argument is that the American Saffordshire, Staffordshire Bull and Bull Terrier are lumped in as PBTs when most PBTs are the result of cross-breeding (mostly by thugs, criminals and sporting POSs--Michael Vick) of these fine breeds to produce redzone dogs that fight or taught to attack. Well, news flash, I can produce an attack dog that can kill you from a docile Dalmation.
So, be reasonable as well as knowledgeable, and read a little about an Amstaff, Bully or a Staff from reputable sources such as the American Kennel Club. You will see these dogs shown in the show ring each year at Westminister or other great dog shows as well as agility and obedience events. They don't attack other dogs, their handlers or the judges because instant and permanent disqualification, revocation of their breeding endorsement and other penalties will apply.
There you go, kanawa. There's a complete break from reality for you. You can train a dalamation anyway you want and I'll kill the damn thing with my bare hands. You wanted an example? There's an example.