A pit may be reopened.Logical formLearned from3 sentences. A pit may undergo operations.Logical formLearned from3 sentences. A (pit bull) can be ferocious.Logical formLearned from3 sentences. A (trading pit) may pertain-to a US-city.Logical formLearned from3 sentences. Pits may lose ground to (convection smoke boxes).Logical formLearned from3 sentences. A string can be constituted-of-or-filled-with pits.Logical formLearned from3 sentences. Pits may undergo construction.Logical formLearned from3 sentences. A (north wall) may pertain-to a pit.Logical formLearned from3 sentences. A pit can be on a floor.Logical formLearned from3 sentences. A pit may enlarge.Logical formLearned from3 sentences. Pits may undergo an initiation.Logical formLearned from3 sentences. A pit may undergo an elimination.Logical formLearned from3 sentences. A (mine pit) can be at a mine.Logical formLearned from3 sentences. A big pit can be at a mine.Logical formLearned from3 sentences. Characteristics may pertain-to a big pit.Logical formLearned from3 sentences.