A substance may undergo modifications.Logical formLearned from9 sentences. Toxic substances can be in a workplace.Logical formLearned from9 sentences. A nation may undergo a substance.Logical formLearned from9 sentences. Substances can be oil.Logical formLearned from9 sentences. A substance may be investigated.Logical formLearned from9 sentences. Chemical substances may undergo a production.Logical formLearned from9 sentences. A hazardous substance may undergo concentration.Logical formLearned from9 sentences. Substances can be sour.Logical formLearned from9 sentences. A substance can be to a report.Logical formLearned from9 sentences. Substances can be paramagnetic.Logical formLearned from9 sentences. A substance can be prescribed.Logical formLearned from9 sentences. Parts may pertain-to a substance.Logical formLearned from9 sentences. Allegations can be constituted-of-or-filled-with (substance abuse).Logical formLearned from9 sentences. Someone may supply a substance.Logical formLearned from9 sentences. Nature may undergo a substance.Logical formLearned from9 sentences.