Assertion: sassafras's bark | /r/HasProperty | rich
Facets:
value: in tannins
type: LOCATION
Source sentences:
text: Dogwoods have been used medicinally for generations; the bark is rich in tannins, so ground bark or leaves are used to treat pain, fevers, backaches, dizziness, weakness, excessive sweating, uterine bleeding, and incontinence.
text: The bark of Cornus species is rich in tannins and has been used in traditional medicine as a substitute for quinine.[clarification needed]