World may undergo a collapse.Logical formLearned from20 sentences. Collapse can be on a road.Logical formLearned from20 sentences. A collapse may undergo timing.Logical formLearned from20 sentences. Talks may risk collapse.Logical formLearned from20 sentences. A (rescue plan) may undergo a collapse.Logical formLearned from20 sentences. A (crane collapse) can be deadly.Logical formLearned from20 sentences. An (apartheid regime) may undergo a collapse.Logical formLearned from20 sentences. A month may undergo a collapse.Logical formLearned from20 sentences. A shelf may undergo a collapse.Logical formLearned from20 sentences. Walls may undergo a collapse.Logical formLearned from20 sentences. A collapse may pertain-to a (stock market).Logical formLearned from20 sentences. A collapse can be horrendous.Logical formLearned from20 sentences. Economic collapse can be in a country.Logical formLearned from20 sentences. A collapse can be spontaneous.Logical formLearned from20 sentences. A public-health system may undergo a collapse.Logical formLearned from20 sentences.