Assertion: rhino's horn | /r/HasProperty | keratin
Facets:
value: with a bony core
type: OTHER
Source sentences:
text: Their horns are made of solid keratin, in which they differ from the horns of bovids (cattle and their relatives), which are keratin with a bony core, and deer antlers, which are solid bone.
text: These are made of solid keratin, in which they differ from the horns of bovids (cattle and their relatives), which are keratin with a bony core, and deer antlers, which are solid bone.