An era can be urban.Logical formLearned from13 sentences. (Fire suppression) can be during an industrial era.Logical formLearned from13 sentences. Eras may undergo an opening.Logical formLearned from13 sentences. Persons may witness an end of an era.Logical formLearned from13 sentences. Fear can be in an era of crisis.Logical formLearned from13 sentences. A height may pertain-to a (disco era).Logical formLearned from13 sentences. An era can be catastrophic.Logical formLearned from13 sentences. An era may undergo productions.Logical formLearned from13 sentences. Physicists may pertain-to an era.Logical formLearned from13 sentences. An era can be constituted-of-or-filled-with financial markets.Logical formLearned from13 sentences. An era may pertain-to an existence.Logical formLearned from13 sentences. An era may pertain-to lives.Logical formLearned from13 sentences. A match may pertain-to an era.Logical formLearned from13 sentences. A male may ratify an end to an era.Logical formLearned from13 sentences. A cronyism may characterise an era.Logical formLearned from13 sentences.