A (security guard) can be civilian.Logical formLearned from259 sentences. Security can be at an airport.Logical formLearned from258 sentences. A (homeland security) may pertain-to persons.Logical formLearned from255 sentences. A review can be constituted-of-or-filled-with security.Logical formLearned from255 sentences. A threat can be to national security.Logical formLearned from255 sentences. (Security measures) may be took.Logical formLearned from255 sentences. (Security measures) can be enhanced.Logical formLearned from255 sentences. A (security blanket) may pertain-to a person.Logical formLearned from254 sentences. A (security conference) may pertain-to a world-city.Logical formLearned from254 sentences. A role can be in security.Logical formLearned from254 sentences. A (security situation) can be in a world-city.Logical formLearned from251 sentences. A member may pertain-to a (security detail).Logical formLearned from248 sentences. An increase can be in security.Logical formLearned from248 sentences. Losses can be on securities.Logical formLearned from247 sentences. Threats can be to a national security.Logical formLearned from246 sentences.