Assertion: caffeine | /r/HasProperty | substance
Facets:
Source sentences:
text: Although caffeine is a substance that is a widely used stimulant all over the world, it is not regulated by any governmental body.
text: Caffeine is one substance that could potentially worsen symptoms of the condition.
text: Because caffeine is a substance used by the young and old in every country and on every continent its effects affect billions.