Assertion: porcupine's spine | /r/AtLocation | the skin
Facets:
value: firmly
type: MANNER
value: singly
type: MANNER
value: loosely
type: MANNER
Source sentences:
text: The Old World species have spines that are grouped into clusters, while the New World species have spines that are attached to the skin singly.
text: Also, the spines are loosely attached to the skin.
text: Hedgehogs are covered with large number of short, thick spines that are firmly attached to the skin.