Assertion: porcupine's quill | /r/HasProperty | stiff
Facets:
value: along animal’s
type: OTHER
Source sentences:
text: The hollow quills of New World porcupines are sharp, stiff, and circular in cross section and have barbed tips.
text: The quills are stiff hairs about 3 inches (7.5 centimeters) long that act as armor to protect the porcupine.
text: The porcupine is easily recognized by its many quills, which are long, sharp and stiff, especially along the animal’s back and tail.