(Coal mines) can be unprofitable.Logical formLearned from24 sentences. Strikes may pertain-to (coal miners).Logical formLearned from24 sentences. (Coal mines) can be in an area.Logical formLearned from24 sentences. A mine can be (coal mine).Logical formLearned from24 sentences. (Coal mine accidents) can be in a country.Logical formLearned from23 sentences. A (coal mine) may pertain-to a company.Logical formLearned from23 sentences. A total can be constituted-of-or-filled-with some (coal mines).Logical formLearned from23 sentences. (Coal bunkers) may pertain-to a female.Logical formLearned from23 sentences. A coal may run_out.Logical formLearned from23 sentences. Some (coal mines) can be in an area.Logical formLearned from23 sentences. A coal may be sheded.Logical formLearned from23 sentences. A (coal dust) can be airborne.Logical formLearned from23 sentences. Some percent can be constituted-of-or-filled-with (coal production).Logical formLearned from23 sentences. A country may build (coal plants).Logical formLearned from23 sentences. An explosion may kill some (coal miners).Logical formLearned from23 sentences.