A tree can be periodic.Logical formLearned from6 sentences. Leases can be periodic.Logical formLearned from6 sentences. (Progress payments) can be periodic.Logical formLearned from6 sentences. (Benefit payments) can be periodic.Logical formLearned from6 sentences. Meltdowns can be periodic.Logical formLearned from6 sentences. (Banking crises) can be periodic.Logical formLearned from6 sentences. A lie can be periodic.Logical formLearned from6 sentences. (Anti-corruption crackdowns) can be periodic.Logical formLearned from6 sentences. A dialogue can be periodic.Logical formLearned from6 sentences. Electrical storms can be periodic.Logical formLearned from6 sentences. (Diesel fuel shortages) can be periodic.Logical formLearned from6 sentences. Videos can be periodic.Logical formLearned from6 sentences. (Bomb attacks) can be periodic.Logical formLearned from6 sentences. Insults can be periodic.Logical formLearned from6 sentences. (Meteor showers) can be periodic.Logical formLearned from6 sentences.