Assertion: sand dollar | /r/HasProperty | echinoid
Facets:
Source sentences:
text: A sand dollar (Echinarachnius parma) is an echinoid, a type of invertebrate animal whose skeletons—called tests—are commonly found on beaches the world over.
text: A sand dollar (Echinarachnius parma) is an echinoid, a type of invertebrate animal whose skeletons-called tests-are commonly found on beaches the world over.
text: Sand dollars are echinoids that live on the ocean floor.