Assertion: bernese mountain dog | /r/HasProperty | believed
Facets:
value: widely
type: DEGREE
Source sentences:
text: It is believed the Sennenhund breeds developed as crosses between farm dogs from the Swiss Alps and Molosser or mastiff-type dogs the Romans brought with them when they invaded the Alps in the first century
text: While the actual origin of the Bernese Mountain dog is a bit uncertain, it is widely believed that these dogs were first created in Switzerland when the Roman Armies invaded Switzerland over 2000 years ago.