Assertion: sword | /r/HasProperty | small amount of carbon
Facets:
value: after etching the blade
type: TEMPORAL
Source sentences:
text: Steel is an alloy of iron (ferrite) and a small amount of carbon (cementite), usually between 0.2 and 1.5 percent.
text: After etching the blade with acidic substances, it is the small percentage of nickel present in meteoric iron that creates the distinctive silvery patterns that faintly light up against the dark background of iron or steel that become darkened by the effect of the acids.