Assertion: norfolk terrier's lifespan | /r/HasProperty | 6.2-6.7 years
Facets:
value: according to a national survey
type: OTHER
Source sentences:
text: Whereas the normal lifespan of a Newfoundland in 1998 was 6.2-6.7 years according to a national survey done by the Newfoundland Club of America , our dogs live up until 15 years of age.