An appearance can be periodic.Logical formLearned from27 sentences. Rumors can be periodic.Logical formLearned from27 sentences. A series may pertain-to a periodic table.Logical formLearned from27 sentences. A periodic table may undergo (transition elements).Logical formLearned from27 sentences. Boundaries can be periodic.Logical formLearned from27 sentences. A row may pertain-to a periodic table.Logical formLearned from27 sentences. A calibration can be periodic.Logical formLearned from27 sentences. Medias can be periodic.Logical formLearned from26 sentences. A column can be periodic.Logical formLearned from26 sentences. A lattice can be periodic.Logical formLearned from26 sentences. Treatments can be periodic.Logical formLearned from26 sentences. (Reporting provisions) can be periodic.Logical formLearned from26 sentences. Communications can be periodic.Logical formLearned from26 sentences. Forcings can be periodic.Logical formLearned from26 sentences. An interval can be periodic.Logical formLearned from26 sentences.