Assertion: sponge | /r/MadeOf | intricate system of canals
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Sponges characteristically have a porous skeleton, usually containing an intricate system of canals, that is composed of fibrous material or siliceous or calcareous spicules.
text: Sponges characteristically have a porous skeleton, usually containing an intricate system of canals, that is composed of fibrous material or siliceous or calcareous spicules.