Some bodies can be from a (coal mine).Logical formLearned from12 sentences. Some (coal mines) can be in a city.Logical formLearned from12 sentences. A (coal mine) can be licensed.Logical formLearned from12 sentences. Some miners may be trapped in a (coal mine).Logical formLearned from12 sentences. (Coal mine blast) may undergo a (death toll).Logical formLearned from12 sentences. A (coal mine) can be an one.Logical formLearned from12 sentences. A (coal reserve) can be verified.Logical formLearned from12 sentences. Coal can be as fuel.Logical formLearned from12 sentences. Oil can be from coal.Logical formLearned from12 sentences. Coal may fall.Logical formLearned from12 sentences. (Coal seams) can be thick.Logical formLearned from12 sentences. A coal can be volatile.Logical formLearned from12 sentences. A pneumoconiosis may pertain-to (coal workers).Logical formLearned from12 sentences. A father may work as a (coal miner).Logical formLearned from12 sentences. Coal may be imported.Logical formLearned from12 sentences.