Assertion: echinoderm's arm | /r/HasProperty | formed of jointed skeletal elements
Facets:
Source sentences:
text: Whether stalked or mobile, the main part of the animal lies in a cup-shaped calcareous structure, the calyx, which is surrounded by 5 movable arms formed of jointed skeletal elements.
text: The main part of the animal lies in a cup-shaped calcareous structure, the calyx, which is surrounded by 5 movable arms formed of jointed skeletal elements.