Cases of (drug smuggling) can be frequent in a country.Logical formLearned from4 sentences. A sound of (aircraft overhead) can be frequent.Logical formLearned from4 sentences. A sound of explosions can be frequent.Logical formLearned from4 sentences. Uprisings can be frequent in a country.Logical formLearned from4 sentences. (Health checks) can be frequent.Logical formLearned from4 sentences. Uprisings can be frequent in prisons.Logical formLearned from4 sentences. Vandalism can be frequent.Logical formLearned from4 sentences. Flare-ups can be frequent.Logical formLearned from4 sentences. A (drug use) can be frequent.Logical formLearned from4 sentences. (Border skirmishes) can be frequent.Logical formLearned from4 sentences. Desertions can be frequent in an army.Logical formLearned from4 sentences. Kidnappings may remain frequent.Logical formLearned from4 sentences. Clashes may remain frequent.Logical formLearned from4 sentences. Leaks can be frequent.Logical formLearned from4 sentences. Armed robberies can be frequent.Logical formLearned from4 sentences.