Operations may supply coal to steel.Logical formLearned from16 sentences. An explosion may tear through a (coal mine).Logical formLearned from16 sentences. A flood can be at a (coal mine).Logical formLearned from16 sentences. Coal may be used for heating.Logical formLearned from16 sentences. (Coal mines) may pertain-to a state.Logical formLearned from16 sentences. A (methane fire) can be at a (coal mine).Logical formLearned from16 sentences. A (coal dust) can be black.Logical formLearned from16 sentences. A (coal production base) may pertain-to a country.Logical formLearned from16 sentences. A heart may pertain-to a (coal belt).Logical formLearned from16 sentences. Electricity can be from coal.Logical formLearned from16 sentences. A (coal mining industry) may pertain-to a nation.Logical formLearned from16 sentences. A (coal capital) may pertain-to a country.Logical formLearned from16 sentences. Natural resources may include coal.Logical formLearned from16 sentences. A country can be (coal producer).Logical formLearned from16 sentences. A (coal mine) can be disused.Logical formLearned from16 sentences.