Assertion: black rat | /r/HasAspect | brown or norway rats
Facets:
Source sentences:
text: Black rats (which have black or brown fur, large ears, and tails that are longer than the rest of their bodies), brown or Norway rats (which have brown fur except on the belly, small ears, and tails that are shorter than the rest of their bodies), and Polynesian rats (smaller rats with brown fur all over their bodies and tails that may be either shorter or longer than the rest of their bodies) are the only invasive species of rats.