Assertion: sea cucumber | /r/HasProperty | a class of echinoderms
Facets:
Source sentences:
text: Sea cucumbers are a class of echinoderms, the Holothuroidea.
text: Sea cucumbers are a class of echinoderms, the Holothuroidea.
text: Sea cucumbers are a class of echinoderms, the Holothuroidea.