Substances may be involved.Logical formLearned from58 sentences. A substance can be invisible.Logical formLearned from57 sentences. A substance can be metallic.Logical formLearned from57 sentences. Leaks can be constituted-of-or-filled-with hazardous substances.Logical formLearned from57 sentences. Marijuana can be a substance.Logical formLearned from57 sentences. Levels can be constituted-of-or-filled-with some substances.Logical formLearned from57 sentences. A substance can be complex.Logical formLearned from56 sentences. A convention can be on psychotropic substances.Logical formLearned from56 sentences. Questions can be constituted-of-or-filled-with substance.Logical formLearned from56 sentences. Substances can be basic.Logical formLearned from56 sentences. A source may pertain-to a substance.Logical formLearned from56 sentences. Substances can be polymeric.Logical formLearned from55 sentences. A substance can be infinite.Logical formLearned from55 sentences. Dangerous substances can be controlled.Logical formLearned from55 sentences. Substances can be dietary.Logical formLearned from55 sentences.