Organic material may undergo concentration.Logical formLearned from14 sentences. (Land mines) may undergo concentration.Logical formLearned from14 sentences. Concentration can be grim.Logical formLearned from14 sentences. (Enemy forces) may undergo concentrations.Logical formLearned from14 sentences. (Minority students) may undergo concentrations.Logical formLearned from14 sentences. Concentration can be a percent.Logical formLearned from14 sentences. Facilities may undergo concentrations.Logical formLearned from14 sentences. Aromas may undergo concentration.Logical formLearned from14 sentences. Concentration can be thick.Logical formLearned from14 sentences. Concentrations can be in a continent.Logical formLearned from14 sentences. Concentration can be in (art history).Logical formLearned from14 sentences. Customers may undergo concentrations.Logical formLearned from14 sentences. Natural gas may undergo concentrations.Logical formLearned from14 sentences. Insulin may undergo concentrations.Logical formLearned from14 sentences. Deaths may undergo concentration.Logical formLearned from14 sentences.