(Soot particles) may cause respiratory distress.Logical formLearned from16 sentences. Soot may undergo a removal.Logical formLearned from16 sentences. Layers can be constituted-of-or-filled-with soot.Logical formLearned from16 sentences. A soot can be particulate.Logical formLearned from15 sentences. Soot can be in air.Logical formLearned from15 sentences. A face may be smeared with soot.Logical formLearned from15 sentences. Soot can be black.Logical formLearned from15 sentences. Standards can be for soot.Logical formLearned from14 sentences. Pieces can be constituted-of-or-filled-with soot.Logical formLearned from14 sentences. Clothings can be black with soot.Logical formLearned from14 sentences. A (pollution standard) can be for (soot particles).Logical formLearned from13 sentences. A mixture can be constituted-of-or-filled-with soot.Logical formLearned from13 sentences. Faces may be blacked with soot.Logical formLearned from13 sentences. A face may be covered in soot.Logical formLearned from13 sentences. A (carbon soot) can be black.Logical formLearned from12 sentences.