Assertion: black rhinoceros's horn | /r/HasProperty | known on black rhino
Facets:
Source sentences:
text: The longest horn known on a black rhino was 1,2 m (4 feet 9 inches) long (they average about 0,51 m (20 inches).
text: The longest horn known on a black rhino was 1,2 m (4 feet 9 inches) long (they average about 0,51 m (20 inches).