Assertion: white rhinoceros's horn | /r/MadeOf | 50 cm long
Facets:
value: typically
type: TEMPORAL
value: of keratin
type: OTHER
value: with the larger front horn
type: OTHER
Source sentences:
text: Two horns on the skull are made of keratin with the larger front horn typically 50 cm long (20 inches), but sometimes up to 140 cm (55 inches).