Assertion: collie's amount | /r/HasProperty | hardiness
Facets:
Source sentences:
text: The Border Collie, a medium-sized dog at 30 to 45 pounds, possesses a seemingly supernatural amount of energy and stamina — a hardiness that was developed when he was required to work all day in the hills and valleys of the rugged Scottish border country, sometimes running 50 miles or more a day.