Question: Which of these breeds is now extinct and was never established, the Toy Bulldog or Wirehaired Vizsla?
Sentence (from "Cryoconservation of animal genetic resources"): Therefore, efforts have been made by national governments and non-governmental organizations, such as the Livestock Conservancy, to encourage conservation of livestock genetics through cryoconservation, as well as through other "ex situ" and "in situ" strategies.
Relevant evidence: No