Assertion: pyrite | /r/HasProperty | struck against steel
Facets:
Source sentences:
text: This is likely due to the sparks that result when pyrite is struck against steel.
text: This is likely due to the sparks that result when pyrite is struck against steel or flint.
text: This is likely due to the sparks that result when pyrite is struck against steel.
text: This is likely due to the sparks that result when pyrite is struck against steel.