Premise: Heroin , also known as diamorphine among other names , is an opiate most commonly used as a recreational drug for its euphoric effects . The total number of opiate users has increased from 1998 to 2007 after which it has remained more or less stable . Opiate is a term classically used in pharmacology to mean a drug derived from opium .
Hypothesis: Heroin is derived from opium.
Label: ENTAILMENT