(Drill instructors) can be male.Logical formLearned from21 sentences. A drill may pertain-to a world-city.Logical formLearned from21 sentences. A drill can be successful.Logical formLearned from20 sentences. A drill can be comprehensive.Logical formLearned from20 sentences. Drills can be weekly.Logical formLearned from20 sentences. A country may kick_off military drills.Logical formLearned from20 sentences. A drill may drill.Logical formLearned from20 sentences. Drills can be fundamental.Logical formLearned from20 sentences. A person may use a drill.Logical formLearned from20 sentences. An end may pertain-to a (drill string).Logical formLearned from20 sentences. Drills can be high-speed.Logical formLearned from20 sentences. A (drill bit) may pertain-to a person.Logical formLearned from20 sentences. A (drill pipe) can be composite.Logical formLearned from20 sentences. A country may hold military drills.Logical formLearned from20 sentences. Drills may be dubbed.Logical formLearned from20 sentences.