A (methane gas explosion) can be in a (coal mine).Logical formLearned from22 sentences. A (coal sector) may pertain-to a country.Logical formLearned from22 sentences. A flood can be in a (coal mine).Logical formLearned from22 sentences. (Coal miner) may tumble some percent to some rupiah.Logical formLearned from22 sentences. Thousands can be constituted-of-or-filled-with (coal mines).Logical formLearned from22 sentences. A (coal mining) may pertain-to a country.Logical formLearned from22 sentences. A cave-in can be at a (coal mine).Logical formLearned from21 sentences. A (coal mining) can be illegal.Logical formLearned from21 sentences. A (coal consumption) can be annual.Logical formLearned from21 sentences. A supplier can be constituted-of-or-filled-with coal.Logical formLearned from21 sentences. A female may carry a cargo of coal.Logical formLearned from21 sentences. A male can be a coal.Logical formLearned from21 sentences. A percent may pertain-to a (coal output).Logical formLearned from21 sentences. (Coal reserve) can be in the world.Logical formLearned from21 sentences. Coal can be in a us-state.Logical formLearned from21 sentences.