Assertion: comfrey | /r/ObjectUse | used since ancient times
Facets:
value: to help mend broken bones
type: PURPOSE
Source sentences:
text: Comfrey, also known by the descriptive name “knit bone”, has been used since ancient times, and was described by Dioscorides, an ancient Greek physician and botanist.
text: Comfrey has been used since ancient times to help mend broken bones –