(Construction workers) may break_open a barrel of (poison gas).Logical formLearned from21 sentences. A collapse may be blamed on construction.Logical formLearned from21 sentences. Construction can be in (veteran settlements).Logical formLearned from21 sentences. Construction may pertain-to a memorial.Logical formLearned from21 sentences. (Satellite photos) may show construction.Logical formLearned from21 sentences. A (detention center) may undergo construction.Logical formLearned from21 sentences. A freeze can be on construction of homes.Logical formLearned from21 sentences. (State regulations) may prevent a (plant construction).Logical formLearned from21 sentences. (Construction workers) can be on second floors.Logical formLearned from21 sentences. Planes may undergo construction.Logical formLearned from21 sentences. A (particle accelerator) may undergo construction.Logical formLearned from21 sentences. A country may spark a crisis by beginning construction.Logical formLearned from21 sentences. A (railway system) may undergo construction.Logical formLearned from21 sentences. (Settlement homes) may undergo construction.Logical formLearned from21 sentences. A (home construction) can be shoddy.Logical formLearned from21 sentences.