Assertion: black rhinoceros's horn | /r/HasProperty | keratin
Facets:
value: with a bony core
type: OTHER
value: simply
type: MANNER
value: to clipped human fingernails
type: TRANSITIVE-OBJECT
Source sentences:
text: Rhino horn is simply keratin — chemically identical to clipped human fingernails.
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.