prarie dogs can run very quickly
belgian_sheepdog is not dog. dogs is easier_to_train_than_others. miniature_poodles is not dogs. dogs is not_often. smooth_collie is not herding_dog. pacific_spiny_dogfish is not spiny_dogfish. golden_retrievers is not very_trainable_dogs. german_coolie is not herding_dog. spiny_dogfish is not dogfish. dogs is not easier_to_train_than_others.