Assertion: echinoderm's relative | /r/HasProperty | the sea cucumbers
Facets:
Source sentences:
text: Their closest relatives among the echinoderms are the sea cucumbers (Holothuroidea); both are deuterostomes, a clade which includes the chordates.
text: Their closest relatives among the echinoderms are the sea cucumbers (Holothuroidea); both are deuterostomes, a clade which includes the chordates.