A pursuit can be periodic.Logical formLearned from3 sentences. Steps can be periodic.Logical formLearned from3 sentences. A descent can be periodic.Logical formLearned from3 sentences. Duels can be periodic.Logical formLearned from3 sentences. (Intelligence reports) can be periodic.Logical formLearned from3 sentences. Pileups can be periodic.Logical formLearned from3 sentences. (Succession crises) can be periodic.Logical formLearned from3 sentences. Infections can be periodic.Logical formLearned from3 sentences. A medical treatment can be periodic.Logical formLearned from3 sentences. (Electricity shortages) can be periodic.Logical formLearned from3 sentences. A refuge can be periodic.Logical formLearned from3 sentences. (Terror attacks) can be periodic.Logical formLearned from3 sentences. A docking can be periodic.Logical formLearned from3 sentences. (Bus tours) can be periodic.Logical formLearned from3 sentences. (Coup rumors) can be periodic.Logical formLearned from3 sentences.