(Carbon dioxide) may undergo concentration.Logical formLearned from552 sentences. (Carbon dioxide) may undergo concentrations.Logical formLearned from527 sentences. Concentrations can be increased.Logical formLearned from524 sentences. A person may lose concentration.Logical formLearned from417 sentences. Concentrations can be heavy.Logical formLearned from404 sentences. Some areas can be constituted-of-or-filled-with concentration.Logical formLearned from403 sentences. A lack can be constituted-of-or-filled-with concentration.Logical formLearned from400 sentences. Concentration may pertain-to the world.Logical formLearned from334 sentences. Concentrations can be low.Logical formLearned from315 sentences. Troops may undergo concentration.Logical formLearned from310 sentences. Concentrations can be ambient.Logical formLearned from296 sentences. Persons may undergo concentrations.Logical formLearned from294 sentences. Oxygen may undergo concentration.Logical formLearned from287 sentences. Ownership may undergo concentration.Logical formLearned from286 sentences. A (concentration camp) can be in a country.Logical formLearned from279 sentences.