Some days can be after a collapse.Logical formLearned from11 sentences. A (coal industry) may undergo a collapse.Logical formLearned from11 sentences. A mountain may undergo a collapse.Logical formLearned from11 sentences. A byzantine empire may undergo a collapse.Logical formLearned from11 sentences. An embankment may undergo a collapse.Logical formLearned from11 sentences. A collapse can be in a country.Logical formLearned from11 sentences. A (junk bond market) may undergo a collapse.Logical formLearned from11 sentences. Communities may undergo a collapse.Logical formLearned from11 sentences. A newspaper may undergo a collapse.Logical formLearned from11 sentences. A collapse can be lobar.Logical formLearned from11 sentences. A collapse can be periodic.Logical formLearned from11 sentences. Barriers may undergo a collapse.Logical formLearned from11 sentences. Growth may undergo a collapse.Logical formLearned from11 sentences. A collapse can be in (world trade).Logical formLearned from11 sentences. A bank can be on a brink of collapse.Logical formLearned from11 sentences.