Assertion: hedgehog | /r/CapableOf | use their strong back muscles
Facets:
value: uniquely
type: MANNER
value: to roll up into a ball
type: PURPOSE
Source sentences:
text: Hedgehogs are notoriously shy and use their uniquely strong back muscles to roll up tightly into a ball, hiding their faces and causing their spiny quills to point outwards so that predators can’t see their faces or limbs.