Concentrations may be listed.Logical formLearned from16 sentences. An effort can be constituted-of-or-filled-with concentration.Logical formLearned from16 sentences. A guard can be at (concentration camp).Logical formLearned from16 sentences. Manufacturers may undergo concentration.Logical formLearned from16 sentences. Some levels can be constituted-of-or-filled-with concentration.Logical formLearned from16 sentences. Concentration of (greenhouse gases) may increase.Logical formLearned from16 sentences. Markets may undergo concentration.Logical formLearned from16 sentences. Radioactivity may undergo concentration.Logical formLearned from16 sentences. Concentration can be intended.Logical formLearned from16 sentences. A metal may undergo concentration.Logical formLearned from16 sentences. Melamine may undergo concentrations.Logical formLearned from16 sentences. A toxin may undergo concentrations.Logical formLearned from16 sentences. Tourists may undergo concentration.Logical formLearned from16 sentences. A guard can be at some nazi (concentration camps).Logical formLearned from16 sentences. Persons can be in (concentration camps).Logical formLearned from16 sentences.