Assertion: razor's blade | /r/CapableOf | remain useful
Facets:
Source sentences:
text: In 1901, Mr. King C. Gillette (that name sounds awfully familiar, doesn’t it?) invented the double-edged safety razor, a razor with replaceable blades that quickly became more popular than the static straight razor, which only had a single fixed blade that needed to be sharpened to remain useful.