A surface may pertain-to a pit.Logical formLearned from12 sentences. Water may accumulate in a pit.Logical formLearned from12 sentences. A total of some miners may work in a pit.Logical formLearned from12 sentences. A pit may flood.Logical formLearned from12 sentences. A problem can be in pits.Logical formLearned from12 sentences. A (pit trading) can be formal.Logical formLearned from12 sentences. A pit can be in city.Logical formLearned from12 sentences. Some rows can be constituted-of-or-filled-with some pits.Logical formLearned from11 sentences. A pit can be sealed.Logical formLearned from11 sentences. Pits can be hollow.Logical formLearned from11 sentences. Pits may undergo a closure.Logical formLearned from11 sentences. Pits can be in an area.Logical formLearned from11 sentences. A fire can be in pits.Logical formLearned from11 sentences. An area may pertain-to a pit.Logical formLearned from11 sentences. Pits can be dry.Logical formLearned from11 sentences.