Assertion: porcupine | /r/CapableOf | shake their tails
Facets:
value: violently
type: MANNER
Source sentences:
text: They do not shoot their quills; instead, they get dislodged when they shake their tails.
text: What is true is that a porcupine can shake their tails violently, and this causes quills to fly off the shaking tail.