Assertion: black rhinoceros's horn | /r/CapableOf | grow to about 20 inches
Facets:
value: according to the international rhino foundation
type: OTHER
Source sentences:
text: On the black rhino, the front horn can grow to 20 to 51 inches (51 to 130 centimeters), while the rear horn can grow to about 20 inches, according to the International Rhino Foundation.