(Concentration skills) may pertain-to a person.Logical formLearned from10 sentences. Concentration may pertain-to everyone.Logical formLearned from10 sentences. Concentrations can be in a world-city.Logical formLearned from10 sentences. A (concentration camp) can be in the world.Logical formLearned from10 sentences. Brows may be furrowed in concentration.Logical formLearned from10 sentences. Thc may undergo concentrations.Logical formLearned from10 sentences. An increase can be in concentration of (carbon dioxide).Logical formLearned from10 sentences. Footage may pertain-to (concentration camps).Logical formLearned from10 sentences. Persons may arrive at a (concentration camp one night).Logical formLearned from10 sentences. A male may lack concentration.Logical formLearned from10 sentences. Concentration of (carbon dioxide) can be parts.Logical formLearned from10 sentences. Concentration can be deadly.Logical formLearned from10 sentences. Victims can be in (concentration camps).Logical formLearned from10 sentences. Minerals may undergo concentrations.Logical formLearned from10 sentences. Concentration of income can be a reason.Logical formLearned from10 sentences.