| http://www.w3.org/ns/prov#value | - Let???s take stimulants, for example: At the extreme and toxic end you would have amphetamines and pharmaceutical stimulants or ???uppers???; then, you would have caffeine and other stimulants; and finally, a gentle stimulant that is not as sleep depriving as caffeine, like Yerba Mate (Ilex paraguayensis) on the most natural and innocuous end of the spectrum.
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