A (coal mine) can be dangerous.Logical formLearned from12 sentences. A (coal mine explosion) can be in a province.Logical formLearned from12 sentences. Interests can be in coal.Logical formLearned from12 sentences. A (gas leak) can be at a (coal mine).Logical formLearned from12 sentences. An industrialist can be from a (coal mining).Logical formLearned from12 sentences. Barges can be constituted-of-or-filled-with coal.Logical formLearned from12 sentences. Coal may rise some percent.Logical formLearned from12 sentences. (Coal mine accidents) can be frequent in a country.Logical formLearned from12 sentences. Some persons may be killed in a (coal mine explosion).Logical formLearned from12 sentences. A (coal production capacity) may pertain-to a country.Logical formLearned from11 sentences. A (death toll) can be in a (coal mine).Logical formLearned from11 sentences. A (coal mine gas blast) may kill some persons.Logical formLearned from11 sentences. A (gas outburst) can be at a (coal mine).Logical formLearned from11 sentences. (Coal mines) may suffer explosions.Logical formLearned from11 sentences. A country may export coal.Logical formLearned from11 sentences.