(Shooting sprees) can be periodic.Logical formLearned from4 sentences. (Travel bans) can be periodic.Logical formLearned from4 sentences. Housecleanings can be periodic.Logical formLearned from4 sentences. (Security closures) can be periodic.Logical formLearned from4 sentences. (Infantry exercises) can be periodic.Logical formLearned from4 sentences. A (life support) can be periodic.Logical formLearned from4 sentences. Speeches can be periodic.Logical formLearned from4 sentences. A blast can be periodic.Logical formLearned from4 sentences. An interference can be periodic.Logical formLearned from4 sentences. A campaign can be periodic.Logical formLearned from4 sentences. Explanations can be periodic.Logical formLearned from4 sentences. A belching can be periodic.Logical formLearned from4 sentences. Pullbacks can be periodic.Logical formLearned from4 sentences. (Missile tests) can be periodic.Logical formLearned from4 sentences. A boost can be periodic.Logical formLearned from4 sentences.