(Artillery fire) may undergo concentration.Logical formLearned from14 sentences. (Carbon dioxide concentrations) can be increased.Logical formLearned from14 sentences. Concentration can be in a solution.Logical formLearned from14 sentences. Protection can be for concentration of (rock art).Logical formLearned from14 sentences. Cities may undergo concentration.Logical formLearned from14 sentences. A camp can be (concentration camp).Logical formLearned from14 sentences. Concentration can be in a body.Logical formLearned from14 sentences. Ghgs may undergo concentration.Logical formLearned from14 sentences. Pubs may undergo concentration.Logical formLearned from14 sentences. Concentration can be in a US-city.Logical formLearned from14 sentences. (Plasma concentrations) can be therapeutic.Logical formLearned from14 sentences. A student can be with concentration.Logical formLearned from14 sentences. Concentrations can be realistic.Logical formLearned from14 sentences. Base may undergo concentration.Logical formLearned from14 sentences. Exposures can be to concentrations.Logical formLearned from14 sentences.