A father can be (coal miner).Logical formLearned from95 sentences. A canary can be in a (coal mine).Logical formLearned from95 sentences. Emissions can be from coal.Logical formLearned from92 sentences. (Coal exports) may pertain-to a country.Logical formLearned from92 sentences. A coal may pertain-to the world.Logical formLearned from91 sentences. A coal can be low-grade.Logical formLearned from91 sentences. A (coal miner) may pertain-to a country.Logical formLearned from88 sentences. (Coal fields) may pertain-to a us-state.Logical formLearned from87 sentences. (Coal mines) may pertain-to a country.Logical formLearned from86 sentences. Exports can be constituted-of-or-filled-with coal.Logical formLearned from86 sentences. Coals can be red.Logical formLearned from85 sentences. A (coal producer) may pertain-to a nation.Logical formLearned from85 sentences. A (coal mine) can be in province.Logical formLearned from85 sentences. (Coal miners) can be trapped.Logical formLearned from85 sentences. A coal may pertain-to a person.Logical formLearned from83 sentences.