Stars may undergo concentrations.Logical formLearned from17 sentences. An isotope may undergo concentrations.Logical formLearned from17 sentences. Latinoes may undergo concentration.Logical formLearned from17 sentences. Tanks may undergo concentration.Logical formLearned from17 sentences. Seniors may undergo concentration.Logical formLearned from17 sentences. Factories may undergo concentration.Logical formLearned from17 sentences. Concentration can be combined.Logical formLearned from17 sentences. Concentration can be unbroken.Logical formLearned from17 sentences. Concentration may be increased.Logical formLearned from17 sentences. Concentrations may vary.Logical formLearned from17 sentences. Concentration can be tight.Logical formLearned from17 sentences. Graduates may pertain-to concentration.Logical formLearned from17 sentences. Requirements can be for concentration.Logical formLearned from17 sentences. Concentration may undergo a definition.Logical formLearned from17 sentences. Levels can be constituted-of-or-filled-with concentrations.Logical formLearned from17 sentences.