Pieces can be constituted-of-or-filled-with coal.Logical formLearned from69 sentences. (Surface coal mining operations) may undergo a definition.Logical formLearned from69 sentences. A (coal miner) may pertain-to a country.Logical formLearned from69 sentences. A (coal mine blast) may pertain-to a country.Logical formLearned from68 sentences. Coal may undergo a delivery.Logical formLearned from68 sentences. A coal may pertain-to a female.Logical formLearned from68 sentences. Coal may undergo a conversion.Logical formLearned from68 sentences. Canaries can be in a (coal mine).Logical formLearned from68 sentences. Coal may undergo shipments.Logical formLearned from67 sentences. A male can be (coal miner).Logical formLearned from67 sentences. (Coal miners) can be underground.Logical formLearned from67 sentences. A country may depend on coal.Logical formLearned from67 sentences. Seams can be constituted-of-or-filled-with coal.Logical formLearned from66 sentences. Coal can be in a country.Logical formLearned from65 sentences. (Coal mining) can be an industry.Logical formLearned from65 sentences.