Assertion: collie's lifespan | /r/HasProperty | 12 years
Facets:
Source sentences:
text: The average lifespan of a border collie is 12 years but they have been known to live as long as 14.
text: The average lifespan of the Keeshond dog is 12 years but upon proper care, few dogs can live up to 14 to 15 years.