Assertion: mastiff's ancestor | /r/HasProperty | cane corso
Facets:
Source sentences:
text: The English Mastiff is thought to be either the primary or partial ancestor of the Bullmastiff, American Bulldog, Saint Bernard, Tosa Inu, American Akita, Spanish Mastiff, Dogue de Bordeaux, Cane Corso, Neapolitan Mastiff, Fila Brasileiro, American Mastiff, Boerboel, and many other breeds.