Assertion: cork tree's bark | /r/HasProperty | rich
Facets:
value: in tannin
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 most acacias is rich in tannin, which is used in tanning and in dyes, inks, pharmaceuticals, and other products.