A (coal mine) may flood.Logical formLearned from33 sentences. A (coal seam) may pertain-to a US-city.Logical formLearned from32 sentences. Coal may undergo construction.Logical formLearned from32 sentences. A (coal stove) may pertain-to a person.Logical formLearned from32 sentences. A coal may pertain-to a US-city.Logical formLearned from32 sentences. A tax can be on coal.Logical formLearned from32 sentences. Coal may undergo a processing.Logical formLearned from32 sentences. A coal can be high-grade.Logical formLearned from32 sentences. An explosion may occur in a (coal seam).Logical formLearned from32 sentences. A (coal mine) may be flooded.Logical formLearned from32 sentences. A (coal mining industry) can be dangerous.Logical formLearned from32 sentences. Some (coal mine accidents) can be in a country.Logical formLearned from32 sentences. A substitute can be for coal.Logical formLearned from31 sentences. (Coal deposits) can be rich.Logical formLearned from31 sentences. Some percent can be for coal.Logical formLearned from31 sentences.