Assertion: rhino's horn | /r/MadeOf | substance
Facets:
Source sentences:
text: The horns of the Sumatran rhinoceros are made from a substance called keratin and are therefore very strong.
text: The horn of a rhinoceros is made from compacted hair rather than bone or another substance.
text: The horns of the Sumatran rhinoceros are made from a substance called keratin and are therefore very strong.
text: The horn of a rhinoceros is made from compacted hair rather than bone or another substance.