Assertion: gastropod's shell | /r/HasProperty | calcareous exoskeleton
Facets:
value: typically
type: DEGREE
Source sentences:
text: The mollusc (or mollusk[spelling 1]) shell is typically a calcareous exoskeleton which encloses, supports and protects the soft parts of an animal in the phylum Mollusca, which includes snails, clams, tusk shells, and several other classes.