Assertion: ounce's grain | /r/HasProperty | a stone of 14 pounds
Facets:
Source sentences:
text: The earliest known version of the avoirdupois weight system had the following units: a pound of 6992 grains, a stone of 14 pounds, a woolsack of 26 stone, an ounce of ​1⁄ 16 pound, and finally, the ounce was divided into 16 "parts".