Assertion: sassafras's bark | /r/HasProperty | original base
Facets:
value: for root beer
type: OTHER
Source sentences:
text: The roots and bark of this same plant were the original base for root beer.
text: The roots and bark of the sassafras tree were the original source of flavoring for root beer until studies showed that safrole was carcinogenic, ultimately leading the FDA to ban its use in food products.