A collapse may pertain-to evening.Logical formLearned from15 sentences. A collapse may be announced.Logical formLearned from15 sentences. A (roof collapse) may be caused by construction.Logical formLearned from15 sentences. (Energy trading giant) may undergo a collapse.Logical formLearned from15 sentences. A collapse may pertain-to a tower.Logical formLearned from15 sentences. An economy can be close to collapse.Logical formLearned from15 sentences. A serbian government may undergo a collapse.Logical formLearned from15 sentences. A company can be on a verge of collapse.Logical formLearned from15 sentences. A decade may follow some soviet collapse.Logical formLearned from15 sentences. A collapse can be pulmonary.Logical formLearned from15 sentences. Independence can be after some soviet collapse.Logical formLearned from15 sentences. An educational system may undergo a collapse.Logical formLearned from15 sentences. (Trade negotiations) may undergo a collapse.Logical formLearned from15 sentences. Tasks may change with a collapse of communism.Logical formLearned from15 sentences. A collapse can be in a real-estate market.Logical formLearned from15 sentences.