(Air raid drills) can be monthly.Logical formLearned from7 sentences. A country may stage a drill off a (west coast).Logical formLearned from7 sentences. Pipework to a (drill ship) can be on a surface.Logical formLearned from7 sentences. Pipework can be to a (drill ship).Logical formLearned from7 sentences. Rescuers may hear a sound on a (drill pipe).Logical formLearned from7 sentences. A (power drill) may be held.Logical formLearned from7 sentences. A drill may involve (war games).Logical formLearned from7 sentences. A drill may disrupt a (disarmament deal).Logical formLearned from7 sentences. Part can be in a (tsunami evacuation drill).Logical formLearned from7 sentences. Drills can be in the past.Logical formLearned from7 sentences. Drills can be dangerous.Logical formLearned from7 sentences. Drills may help.Logical formLearned from7 sentences. A drill can be rare.Logical formLearned from7 sentences. Drills may be codenamed.Logical formLearned from7 sentences. A country may hold a drill.Logical formLearned from7 sentences.