Assertion: mastiff's dog | /r/HasProperty | known for its loyalty
Facets:
Source sentences:
text: This dog is known for its loyalty, it has been used as a herding and guardian dog for thousands of years.
text: Newfoundland dogs are known for their giant size, intelligence, tremendous strength, calm dispositions, and loyalty.
text: This dog is known for its loyalty and has been used as a nomad dog for thousands of years.