Collapses can be sudden.Logical formLearned from44 sentences. A collapse may pertain-to a continent.Logical formLearned from44 sentences. Skyscrapers may undergo a collapse.Logical formLearned from44 sentences. Roles can be in a collapse.Logical formLearned from44 sentences. Memories may pertain-to a collapse.Logical formLearned from44 sentences. Protests can be over a collapse of (investment schemes).Logical formLearned from44 sentences. An economic collapse can be stunning.Logical formLearned from44 sentences. A collapse may pertain-to a currency.Logical formLearned from44 sentences. A landslide may be triggered by a collapse of a (mining dump).Logical formLearned from43 sentences. (Investment banks) may undergo a collapse.Logical formLearned from43 sentences. A volcano may undergo a collapse.Logical formLearned from43 sentences. A collapse can be thunderous.Logical formLearned from43 sentences. A collapse may occur.Logical formLearned from43 sentences. A (construction sector) may undergo a collapse.Logical formLearned from43 sentences. A collapse can be disorderly.Logical formLearned from43 sentences.