(Security measures) can be unprecedented.Logical formLearned from306 sentences. A (security situation) may pertain-to a country.Logical formLearned from304 sentences. A threat can be to (national security).Logical formLearned from301 sentences. A security may pertain-to an international-political-entity.Logical formLearned from300 sentences. A security may pertain-to systems.Logical formLearned from299 sentences. A (security barrier) may pertain-to a country.Logical formLearned from298 sentences. A range can be constituted-of-or-filled-with (security issues).Logical formLearned from297 sentences. A (security crackdown) may pertain-to a world-city.Logical formLearned from297 sentences. A security may pertain-to data.Logical formLearned from296 sentences. A (security situation) may undergo a deterioration.Logical formLearned from296 sentences. A security can be diplomatic.Logical formLearned from295 sentences. (Security measures) can be physical.Logical formLearned from295 sentences. Security can be lax.Logical formLearned from295 sentences. Securities can be related.Logical formLearned from293 sentences. A (security conference) can be annual.Logical formLearned from291 sentences.