Assertion: porcupine's quill | /r/HasProperty | connected to muscle
Facets:
value: at its base
type: LOCATION
Source sentences:
text: Each quill is connected to a muscle at its base, allowing the porcupine to raise its quills when it feels threatened.
text: Each quill is connected to a muscle at its base, allowing the porcupine to raise its quills when it feels threatened.