Bags can be constituted-of-or-filled-with coal.Logical formLearned from23 sentences. Some (coal miners) may die.Logical formLearned from23 sentences. (Coal deposits) may pertain-to the world.Logical formLearned from23 sentences. Lands may contain coal.Logical formLearned from23 sentences. Coal can be (energy source).Logical formLearned from23 sentences. A coal can be red-hot.Logical formLearned from23 sentences. A world-city may rip through a (coal mine).Logical formLearned from23 sentences. (Coal mines) can be in a country.Logical formLearned from23 sentences. A (methane explosion) can be in a (coal mine).Logical formLearned from23 sentences. (Coal miners) may pertain-to persons.Logical formLearned from23 sentences. A (coal mine) can be unlicensed.Logical formLearned from23 sentences. A (coal belt) may pertain-to a country.Logical formLearned from22 sentences. A (coal pit) can be flooded.Logical formLearned from22 sentences. An importer can be constituted-of-or-filled-with coal.Logical formLearned from22 sentences. A country may use coal.Logical formLearned from22 sentences.