Assertion: ninja | /r/CapableOf | forge their own blades
Facets:
value: with being ground on a stone
type: MANNER
value: from slabs of steel or iron
type: OTHER
Source sentences:
text: Despite the disputed historical existence of the ninjato, Hayes claims to describe it in detail, and suggests that the typical description of the ninjatō could be due to ninja having to forge their own blades from slabs of steel or iron with the cutting edge being ground on a stone, with straight blades being easier to form than the much more refined curved traditional Japanese sword.