A collapse can be volcanic.Logical formLearned from6 sentences. Airlines may undergo a collapse.Logical formLearned from6 sentences. A collapse may pertain-to a band.Logical formLearned from6 sentences. A (reform movement) may undergo a collapse.Logical formLearned from6 sentences. Twin towers may undergo collapses.Logical formLearned from6 sentences. A collapse can be to the ground.Logical formLearned from6 sentences. The world can be on a verge of collapse.Logical formLearned from6 sentences. A collapse can be over.Logical formLearned from6 sentences. A day can be after a collapse.Logical formLearned from6 sentences. Imperial power may undergo a collapse.Logical formLearned from6 sentences. A (debt market) may undergo a collapse.Logical formLearned from6 sentences. A (chain reaction) can be constituted-of-or-filled-with collapse.Logical formLearned from6 sentences. Reason may undergo a collapse.Logical formLearned from6 sentences. A (record label) may undergo a collapse.Logical formLearned from6 sentences. A space may undergo a collapse.Logical formLearned from6 sentences.