Shafts may undergo a collapse.Logical formLearned from9 sentences. Industrial civilization may undergo a collapse.Logical formLearned from9 sentences. A (railway bridge) may undergo a collapse.Logical formLearned from9 sentences. A novel may pertain-to a collapse.Logical formLearned from9 sentences. A club may undergo a collapse.Logical formLearned from9 sentences. Civilizations may undergo a collapse.Logical formLearned from9 sentences. A collapse can be in economic activity.Logical formLearned from9 sentences. A male may predict a collapse.Logical formLearned from9 sentences. A greenback may undergo a collapse.Logical formLearned from9 sentences. Corporations may undergo a collapse.Logical formLearned from9 sentences. A (radio mast) may undergo a collapse.Logical formLearned from9 sentences. A collapse may pertain-to a rig.Logical formLearned from9 sentences. A collapse may be triggered.Logical formLearned from9 sentences. A (television deal) may undergo a collapse.Logical formLearned from9 sentences. White-minority rule may undergo a collapse.Logical formLearned from9 sentences.