Assertion: mastiff's origin | /r/HasProperty | unclear
Facets:
Source sentences:
text: History: While the exact origin of the English Mastiff is unclear, the breed has undoubtedly been around since ancient times.
text: History: While the exact origin of the English Mastiff is unclear, the breed has undoubtedly been around since ancient times.
text: History: While the exact origin of the English Mastiff is unclear, the breed has undoubtedly been around since ancient times.