An idea may pertain-to a substance.Logical formLearned from10 sentences. Substances may cause symptoms.Logical formLearned from10 sentences. A strategy may undergo a substance.Logical formLearned from10 sentences. Khat can be a substance.Logical formLearned from10 sentences. Controlled substances can be for (enforcement purposes).Logical formLearned from10 sentences. A (substance discharge) can be hazardous.Logical formLearned from10 sentences. Controlled substances may undergo destruction.Logical formLearned from10 sentences. Substances may undergo a loss.Logical formLearned from10 sentences. A product may contain a hazardous substance.Logical formLearned from10 sentences. A psychoactive substance may undergo a use.Logical formLearned from10 sentences. Substances may work.Logical formLearned from10 sentences. Some substances may be considered.Logical formLearned from10 sentences. An increase can be in (substance use).Logical formLearned from10 sentences. A substance may undergo a burning.Logical formLearned from10 sentences. A substance may undergo a fusion.Logical formLearned from10 sentences.