Assertion: mastiff's tail | /r/HasProperty | long
Facets:
Source sentences:
text: Bull mastiffs have broad heads with dark eyes, V-shaped ears, long tails and short, smooth coats that come in red, brown or brindle with a black mask over the eyes.
text: Its tail is long, high-set and tapering.
text: tail is long, reaching the hocks.
text: The tail is long, while the skin is somewhat loose, especially around the neck region.
text: Its tail, meanwhile, is long and bushy.
text: Their tail is long, hairy and often curled on the back.