(Coal workers) may be killed on a job.Logical formLearned from15 sentences. A (coal industry death rate) may pertain-to the world.Logical formLearned from15 sentences. Thousands of (coal miners) may clash.Logical formLearned from15 sentences. Strikes can be by (coal miners).Logical formLearned from15 sentences. A (coal mine) can be in province of a country.Logical formLearned from15 sentences. (Coal production) may fall some percent.Logical formLearned from15 sentences. (Coal reserve) can be untapped.Logical formLearned from15 sentences. (Coal production) may begin.Logical formLearned from15 sentences. (Coal stocks) may pertain-to a country.Logical formLearned from15 sentences. Wages may depend on a volume of coal.Logical formLearned from15 sentences. A country may have reserve of coal.Logical formLearned from15 sentences. Stakes can be in (coal mines).Logical formLearned from15 sentences. Some metres can be constituted-of-or-filled-with coal.Logical formLearned from15 sentences. A situation can be in a (coal industry).Logical formLearned from14 sentences. A company can be (coal mining company).Logical formLearned from14 sentences.