Assertion: mammal | /r/HasProperty | characterized by fur
Facets:
Source sentences:
text: Mammals are characterized by their hair or fur, which all species possess during some stage of their life cycles; the milk with which they suckle their young, and their warm-blooded metabolisms, which, as with birds, allows them to inhabit a wide range of habitats, ranging from deserts to oceans to arctic tundra.