A country may undergo collapsings.Logical formLearned from2 sentences. A cavity may undergo collapsings.Logical formLearned from2 sentences. A roof may undergo collapsings.Logical formLearned from2 sentences. Footage may pertain-to collapsings.Logical formLearned from2 sentences. Bridge may undergo collapsings.Logical formLearned from2 sentences. A lung may undergo collapsings.Logical formLearned from2 sentences. A fetus may be followed by collapsings of a skull.Logical formLearned from2 sentences. Microbubbles may undergo collapsings.Logical formLearned from2 sentences. Buildings may undergo collapsings.Logical formLearned from2 sentences. Distance may undergo collapsings.Logical formLearned from2 sentences. Some collapsings may face onto sidewalks.Logical formLearned from2 sentences. Geographies may undergo collapsings.Logical formLearned from2 sentences. Collapsings can be automatic.Logical formLearned from2 sentences. A skull may undergo collapsings.Logical formLearned from2 sentences. Towers may undergo collapsings.Logical formLearned from2 sentences.