Assertion: blue crab's pair | /r/CapableOf | cover their back
Facets:
Source sentences:
text: They also have five pairs of legs; the first bears their claws or pincers, the right claw is usually the largest on the adults, the next three pairs are their walking legs, and the fifth pair of legs are small and normally tucked underneath the rear portion of their carapace (the shell covering their back).