Assertion: hermit crab | /r/CapableOf | pull into their shells
Facets:
value: to protect themselves
type: PURPOSE
Source sentences:
text: Most hermit crabs have a quick reflex when a dark shadow falls over them, and they will pull into their shells to protect and disguise themselves from the birds.
text: They pull back into their shells and roll down of what ever object they were climbing or try to run under something.