Assertion: humpback whale's plate | /r/MadeOf | keratin
Facets:
Source sentences:
text: The plates are made of keratin, which is the same thing human hair and nails are made of.
text: Instead of teeth, humpbacks and other baleen whales use fibrous plates made of keratin to strain their food.
text: The plates are made of keratin, which is the same material that makes up human hair and nails.
text: Instead of teeth they have fringed plates of baleen (made of keratin) hanging from their upper jaws.
text: The plates are made of keratin.