A (coal mine explosion) may pertain-to a country.Logical formLearned from35 sentences. (Coal resources) may undergo a development.Logical formLearned from35 sentences. A (coal sector) may pertain-to a country.Logical formLearned from35 sentences. Coal may undergo a movement.Logical formLearned from35 sentences. Coal can be for (electricity generation).Logical formLearned from35 sentences. (Coal reserve) can be known.Logical formLearned from35 sentences. A (coal country) may pertain-to a country.Logical formLearned from35 sentences. (Coal resources) can be rich.Logical formLearned from34 sentences. (Coal mines) can be bituminous.Logical formLearned from34 sentences. An explosion can be at a (coal mine).Logical formLearned from34 sentences. A mixture can be constituted-of-or-filled-with coal.Logical formLearned from34 sentences. A bag can be constituted-of-or-filled-with coal.Logical formLearned from34 sentences. Coals can be ready.Logical formLearned from34 sentences. Coal can be for energy.Logical formLearned from34 sentences. Coals can be fiery.Logical formLearned from34 sentences.