Assertion: flint's edge | /r/HasProperty | sharpened
Facets:
value: often
type: TEMPORAL
value: by further retouching
type: MANNER
value: purposefully
type: MANNER
Source sentences:
text: At least one edge of the plane might have been purposefully sharpened.
text: Edges were often sharpened by further retouching.
text: It is common to find edges that have been sharpened, points that have been reconstructed and profiles that have been deformed by reworking in order to extend the piece's useful lifetime.