Assertion: king penguin's layer | /r/HasProperty | oiled
Facets:
Source sentences:
text: The outer layer of feathers are oiled and waterproof, and the inner three layers are down feathers, which act as very effective insulation as the bitter cold.
text: They have 4 layers of feathers, the outer layer is oiled and waterproof while the inner 3 layers are down that provide effective insulation against the extreme weather conditions.