Assertion: sponge's skeleton | /r/HasProperty | fibrous meshwork of spongin
Facets:
Source sentences:
text: These skeletons are composed of a fibrous meshwork of spongin, a material related to horn, and owe their absorbent properties to the fineness of the mesh.
text: These skeletons are composed of a fibrous meshwork of spongin, a material related to horn, and owe their absorbent properties to the fineness of the mesh.