A coal may be mined in a country.Logical formLearned from13 sentences. Exposure can be to (coal mine dust).Logical formLearned from13 sentences. (Coal mines) can be adjacent.Logical formLearned from13 sentences. A (coal mine) may undergo workings.Logical formLearned from13 sentences. Coal may produce (carbon dioxide).Logical formLearned from13 sentences. A grandfather can be (coal miner).Logical formLearned from13 sentences. Waggon may blow coals.Logical formLearned from13 sentences. Coals can be heavy.Logical formLearned from13 sentences. Coal can be important.Logical formLearned from13 sentences. Coals can be in a fireplace.Logical formLearned from13 sentences. A coal can be accessible.Logical formLearned from13 sentences. Utilities may burn coal.Logical formLearned from13 sentences. Lobbying can be from a (coal industry).Logical formLearned from13 sentences. (Coal seams) can be thin.Logical formLearned from13 sentences. (Coal miners) may pertain-to a state.Logical formLearned from13 sentences.