Substances can be diagnostic.Logical formLearned from8 sentences. Sources may pertain-to a substance.Logical formLearned from8 sentences. A substance may be introduced.Logical formLearned from8 sentences. Contamination can be with substances.Logical formLearned from8 sentences. A relationship can be between a substance.Logical formLearned from8 sentences. Substances may come into contact.Logical formLearned from8 sentences. Substances can be (food additives).Logical formLearned from8 sentences. Hazardous substances may undergo a substitution.Logical formLearned from8 sentences. A (substance management) can be hazardous.Logical formLearned from8 sentences. A substance may be extracted from plant.Logical formLearned from8 sentences. Biological substances may undergo a use.Logical formLearned from8 sentences. A list may identify substances.Logical formLearned from8 sentences. Toxicological profiles can be for hazardous substances.Logical formLearned from8 sentences. Letters may undergo a substance.Logical formLearned from8 sentences. A relationship can be between exposure to hazardous substances.Logical formLearned from8 sentences.