Assertion: echinoderm | /r/HasProperty | feather stars
Facets:
Source sentences:
text: The echinoderms are a group of animals that includes starfish, urchins, feather stars, and sea cucumbers.
text: Echinoderms include Animals like Starfish, Brittle Star, Sea Urchin, Feather Star,
text: They include sea stars, sand dollars, and feather stars.