Assertion: porcupine's quill | /r/HasProperty | small
Facets:
value: to be effective
type: PURPOSE
Source sentences:
text: New World porcupines have small quills that are around 4 inches (10 cm) long, while Old World porcupines have quills that can grow up to 20 inches (51 cm) long, though there are some exceptions.
text: All baby porcupines (or porcupettes) are born with their quills, but the quills are too small and flexible to be very effective against predators until the porcupine is several months old.