Assertion: sword's blade | /r/CapableOf | curve in erratic way
Facets:
value: naturally
type: MANNER
Source sentences:
text: The smith's skill at this point comes into play as the hammering process causes the blade to naturally curve in an erratic way, the thicker back tending to curve towards the thinner edge, and he must skillfully control the shape to give it the required upward curvature.