Assertion: echinoderm's skeleton | /r/HasProperty | covered by a layer of skin
Facets:
value: outside
type: LOCATION
Source sentences:
text: The plates are usually spiny, and the skeleton is covered outside and in by a layer of skin.
text: The plates are usually spiny, and the skeleton is covered outside and in by a layer of skin.
text: The plates are usually spiny, and the skeleton is covered outside and in by a layer of skin.