(Coal mines) may be operated in a manner.Logical formLearned from17 sentences. A fire can be constituted-of-or-filled-with coals.Logical formLearned from17 sentences. A coal may pertain-to a state.Logical formLearned from17 sentences. Coal can be a resource.Logical formLearned from17 sentences. Coal can be competitive.Logical formLearned from17 sentences. A (coal industry) can be bituminous.Logical formLearned from17 sentences. Canaries can be in (coal mines).Logical formLearned from17 sentences. A (methane gas explosion) can be at a (coal mine).Logical formLearned from17 sentences. A (coal mining industry) may pertain-to a country.Logical formLearned from17 sentences. Some (coal miners) may be caught in a cave-in.Logical formLearned from17 sentences. A strike may pertain-to a (coal miner).Logical formLearned from17 sentences. (Coal mining) can be subsidized.Logical formLearned from17 sentences. Grades can be constituted-of-or-filled-with coal.Logical formLearned from17 sentences. A (coal mine) may undergo a flooding.Logical formLearned from17 sentences. (Coal miner) may lose some percent to some rupiah.Logical formLearned from17 sentences.