Assertion: artichoke's leaf | /r/MadeOf | provitamin a
Facets:
Source sentences:
text: This plant leaves contain polyphenols (cynarin and other chlorogenic products), flavonoids, a bitter principle, other compounds (taraxasterol, pseudo-Taraxasterol, stigmasterol, and beta-Stigmasterol), potassium, provitamin A and many enzymes.