Assertion: porcupine's quill | /r/CapableOf | cover their backs
Facets:
Source sentences:
text: Porcupines are well known for their pointy quills, which cover their backs, sides and tail to provide a natural protection against predators.
text: With about 3,000 to 5,000 quills covering its back, the hedgehog can protect itself from animals that think it would make a tasty snack.
text: barbed quills protect the back, sides, and tail; long, stiff guard hairs cover the front upper part of the body.
text: The long, pointed quills that cover their backs render the animals unapproachable to predators and afford them a relatively long lifespan of five to seven years.