Assertion: flint | /r/HasProperty | struck against steel
Facets:
value: in later eras
type: TEMPORAL
Source sentences:
text: When struck against steel, flint will produce enough sparks to ignite a fire with the correct tinder, or gunpowder used in weapons.
text: Along with arrowheads, flint was also used to create spear points, cutting utensils and fire when struck with steel in later eras.
text: When flint is struck against steel or two flintstones are struck together, they can produce a spark.