Equipment can be in underground (coal mines).Logical formLearned from10 sentences. A mine may produce coal some shifts.Logical formLearned from10 sentences. Miners can be constituted-of-or-filled-with coal.Logical formLearned from10 sentences. A coal can be inefficient.Logical formLearned from10 sentences. (Heap coals) can be constituted-of-or-filled-with fire.Logical formLearned from10 sentences. A (coal mine) can be profitable.Logical formLearned from10 sentences. A coal may pertain-to an area.Logical formLearned from10 sentences. A country can be an exporter of coal.Logical formLearned from10 sentences. A (coal heat) may pertain-to a chieftaincy.Logical formLearned from10 sentences. A (coal seam) may be liquefied.Logical formLearned from10 sentences. (Home remedies) can be (coal syrup soda).Logical formLearned from10 sentences. (Number one) can be at coal.Logical formLearned from10 sentences. A (coal syrup soda) can be medicinal.Logical formLearned from10 sentences. A view can be as coal.Logical formLearned from10 sentences. (Coal producer) may say that something-is-the-case.Logical formLearned from10 sentences.