Assertion: starfish | /r/PartOf | phylum
Facets:
Source sentences:
text: Starfish belong to a phylum or a big group of animals called echinoderms, and that includes starfish, sea urchins, brittle stars, sea cucumbers and something called a feather star.
text: Closely related to the sea urchin and sand dollar, a starfish belongs to the phylum Echinoderm and the class Asteroidea.
text: Sea stars belong to the phylum Echinodermata.