Assertion: crustacean's shell | /r/HasProperty | closed
Facets:
value: tightly
type: MANNER
value: in order to prevent it
type: PURPOSE
Source sentences:
text: Clams and oysters in the shell should be alive and the shells should be closed tightly or should close when the mollusks are tapped.
text: The shell can be closed tightly in order to prevent it from drying out.