Assertion: ounce's grain | /r/HasProperty | 24 grains
Facets:
Source sentences:
text: Its units are the grain, pennyweight (24 grains), troy ounce (20 pennyweights), and troy pound (12 troy ounces).
text: The Troy system of weight is based upon the grain, pennyweight (24 grains), troy ounce (20 pennyweights), and troy pound (12 troy ounces).