Assertion: porcupine's quill | /r/CapableOf | serve as warning
Facets:
value: to potential predators
type: TRANSITIVE-OBJECT
Source sentences:
text: At the base of the tail, the porcupine has blunt, hollow quills that rattle when shaken, serving as a warning to potential predators.
text: At the base of the tail, the porcupine has blunt, hollow quills that rattle when shaken, serving as a warning to potential predators.