Assertion: antelope's horn | /r/MadeOf | compressed keratin
Facets:
Source sentences:
text: A true horn is made of compressed keratin and can’t be shed while antlers shed each year and are formed from bone.
text: True antlers are made of bone and shed each year; true horns are made of compressed keratin that grows from a bony core and are never shed.
text: True antlers are made of bone and shed each year; true horns are made of compressed keratin that grows from a bony core and are never shed.