Assertion: dolphin's characteristic | /r/AtLocation | mammal
Facets:
Source sentences:
text: You can tell that a dolphin is a mammal because it has a number of characteristics that are only found in mammals rather than in fish, or any other kind of animal.
text: Dolphins are marine mammals and share several characteristics found among almost all mammals including, breathing air, being warm-blooded and carrying offspring in their womb.