Assertion: indian rhinoceros's horn | /r/HasProperty | same material
Facets:
Source sentences:
text: The single horn is made of keratin, the same material found in the hair and nails of humans.
text: The horn of the Indian rhino is made of keratin; the same material that our fingernails and hair are made of.
text: Both male and female rhinos have a single horn made of keratin, the same material found in human fingernails, which is highly valued in Asian medicine.