| http://www.w3.org/ns/prov#value | - The young adults were asked to consume one of two energy drinks: one contained 120 milligrams (mg) of caffeine and the other contained 360 mg of caffeine. (A regular 8-ounce cup of brewed coffee has 100-200 mg of caffeine.) A third group drank a placebo, which contained no caffeine or other stimulants.
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