A (summit meeting) may undergo a collapse.Logical formLearned from9 sentences. A tradition may undergo a collapse.Logical formLearned from9 sentences. Some reasons can be for a collapse.Logical formLearned from9 sentences. A collapse may pertain-to a federation.Logical formLearned from9 sentences. A pillar may undergo a collapse.Logical formLearned from9 sentences. Profits may undergo a collapse.Logical formLearned from9 sentences. A section may undergo a collapse.Logical formLearned from9 sentences. A financial collapse can be sudden.Logical formLearned from9 sentences. (House prices) may undergo a collapse.Logical formLearned from9 sentences. A hillside may undergo a collapse.Logical formLearned from9 sentences. A collapse may imperil a financial system.Logical formLearned from9 sentences. A moment can be in a collapse of communism.Logical formLearned from9 sentences. A collapse of a (housing market) may lead a country.Logical formLearned from9 sentences. A collapse can be in a price of aluminum.Logical formLearned from9 sentences. A road may teeter on a brink of collapse.Logical formLearned from9 sentences.