Assertion: crustacean's pair | /r/CapableOf | play sensory role
Facets:
value: in detecting food
type: PURPOSE
Source sentences:
text: The head usually bears five pairs of appendages: two pairs of antennae that play a sensory role in detecting food as well as changes in humidity and temperature; a pair of mandibles that are used for grasping and tearing food; and two pairs of maxillae that are used for feeding purposes.