Assertion: polar bear's layer | /r/HasProperty | up to 4 inches thick
Facets:
Source sentences:
text: This is mostly because they need the fat to survive in the Arctic (polar bears have a layer of blubber under their skin that can be up to 4 inches thick!), and berries just don't cut it.
text: Polar Bears have a layer of blubber under their skin which can be up to 4 inches thick and helps to keep them warm.