A civilization may undergo a collapse.Logical formLearned from135 sentences. A (subprime mortgage market) may undergo a collapse.Logical formLearned from134 sentences. A collapse may pertain-to a US-city.Logical formLearned from134 sentences. A collapse can be physical.Logical formLearned from133 sentences. A collapse can be slow.Logical formLearned from132 sentences. A house may undergo a collapse.Logical formLearned from132 sentences. A dynasty may undergo a collapse.Logical formLearned from131 sentences. An (energy giant) may undergo a collapse.Logical formLearned from130 sentences. A (tour operator) may undergo a collapse.Logical formLearned from129 sentences. A (bridge collapse) may pertain-to a US-city.Logical formLearned from129 sentences. A financial sector may undergo a collapse.Logical formLearned from129 sentences. An effort may undergo a collapse.Logical formLearned from128 sentences. A star may undergo a collapse.Logical formLearned from127 sentences. A collapse can be in a month.Logical formLearned from127 sentences. A collapse can be emotional.Logical formLearned from126 sentences.