Assertion: distilled water's metal | /r/HasProperty | steel
Facets:
value: usually
type: DEGREE
Source sentences:
text: If you used metal thumbtacks as electrodes instead of graphite pins, the metal (usually steel or brass) will dissolve, or corrode, at the positive battery pole and instead of (or in addition to) gas production, you should see that the metal thumbtack turns reddish brown.