Assertion: sword's groove | /r/CapableOf | lighten the blade
Facets:
value: without losing any strength
type: MANNER
Source sentences:
text: The blades were between 72 - 80cm (29" - 32") long and about 7.5cm (3") broad at their widest with a shallow but broad groove or fuller down the centre of both sides to lighten the blade without losing any strength.