Complex sentence: Heroin, LSD, marijuana, peyote, mescaline, and psilocybin are Schedule I drugs, and with the exception of marijuana their manufacture or distribution is a class A felony carrying a maximum of 20 years in prison.
Split into simpler sentences: Heroin, LSD, marijuana, peyote, mescaline, and psilocybin are Schedule I drugs. There manufacture of distribution is a class A felony, with (except for marijuana) a maximum of 20 years in prison.