Assertion: echinoderm's arm | /r/HasAspect | a row of projections
Facets:
Source sentences:
text: The stalk and the arms have a jointed appearance, and each arm has a row of projections, the pinnules, on either side, giving a feathery appearance.
text: The stalk and the arms have a jointed appearance, and each arm has a row of projections, the pinnules, on either side, giving a feathery appearance.