Assertion: callus | /r/HasProperty | useful mean
Facets:
Source sentences:
text: The male has [...] also an ischial callosity, but less evident and coloured, furthermore, these callosities are a useful mean [...] for recognizing male and [...] female from far away (we remind that medium sized males and adult females may be easily be mistaken, whilst a big male is unmistakable for size, muzzle and posture).