Assertion: boomerang's edge | /r/HasProperty | sharpened
Facets:
value: often
type: TEMPORAL
Source sentences:
text: The hitting edge was sharpened leaving the teeth of the jawbone intact.
text: The edges of shuriken were often sharpened, so they could be used to penetrate skin or open arteries.
text: The blade had a pronounced curve, like a sickle, though only the outside edge was sharpened.