Assertion: holly's leaf | /r/MadeOf | caffeine
Facets:
Source sentences:
text: The leaves of the yaupon contain caffeine; in fact, the leaves actually have the highest caffeine content of any plant native to North America.
text: Guayusa leaves contain caffeine (1.73–3.48 %), theobromine and other dimethylxanthines (among them paraxanthine and theophylline).