Assertion: quinine | /r/AtLocation | the bark of the cinchona tree
Facets:
Source sentences:
text: Quinine is a compound found in the bark of the Cinchona tree and has been used to treat malaria.
text: Quinine is a naturally occurring chemical derived from quinoline, an alkaloid found in the bark of cinchona trees.
text: Once frequently used to treat malaria, quinine is an alkaloid found in the bark of the cinchona tree.