A mine may begin production.Logical formLearned from64 sentences. A (ventilation system) may pertain-to a mine.Logical formLearned from64 sentences. Demand may outstrip (mine supply).Logical formLearned from64 sentences. Control may pertain-to mines.Logical formLearned from64 sentences. Managers may pertain-to a mine.Logical formLearned from64 sentences. A mine may begin.Logical formLearned from63 sentences. An (accident investigation team) may travel to a mine.Logical formLearned from63 sentences. (Diamond mines) may pertain-to a country.Logical formLearned from63 sentences. (Coal mines) can be dangerous.Logical formLearned from63 sentences. Some percent can be constituted-of-or-filled-with some mines.Logical formLearned from63 sentences. A mine may be owned.Logical formLearned from62 sentences. A strike can be at a (copper mine).Logical formLearned from62 sentences. A campaign can be against (land mines).Logical formLearned from62 sentences. Mines can be plastic.Logical formLearned from62 sentences. Production can be at mines.Logical formLearned from61 sentences.