(Coal miners) can be across a country.Logical formLearned from12 sentences. Protests can be by (coal miners).Logical formLearned from12 sentences. Environmental hazards may be created by (coal mining).Logical formLearned from12 sentences. (Coal mines) can be monopolistic.Logical formLearned from12 sentences. (Company towns) may pertain-to a (coal industry).Logical formLearned from12 sentences. (Coal mines) may obstruct a functioning of a market.Logical formLearned from12 sentences. A (coal mine) may pertain-to a nation.Logical formLearned from12 sentences. The temperature may pertain-to coals.Logical formLearned from12 sentences. A result can be constituted-of-or-filled-with (surface coal mining).Logical formLearned from12 sentences. A person may conduct (surface coal mining).Logical formLearned from12 sentences. A (surface coal mining operation) may be conducted.Logical formLearned from12 sentences. A sale may pertain-to a coal.Logical formLearned from12 sentences. (Surface coal mining) may be conducted.Logical formLearned from12 sentences. (Surface coal mining) may undergo a cessation.Logical formLearned from12 sentences. Fuels can be from coal.Logical formLearned from12 sentences.