Assertion: pig's relative | /r/HasProperty | cetacean
Facets:
Source sentences:
text: Despite their physical resemblance to pigs and other terrestrial even-toed ungulates, the closest living relatives of the Hippopotamidae are cetaceans (whales, dolphins, porpoises, etc.), from which they diverged about 55 million years ago.
text: Several lines of evidence, first from blood proteins, then from molecular systematics and DNA and the fossil record, show that their closest living relatives are cetaceans (whales, dolphins, and porpoises).
text: closest relatives in the animal kingdom are the Cetaceans –