An era may change.Logical formLearned from12 sentences. An era can be seminal.Logical formLearned from12 sentences. Details may pertain-to an era.Logical formLearned from12 sentences. An era can be constituted-of-or-filled-with retrenchment.Logical formLearned from12 sentences. A view may show an era.Logical formLearned from12 sentences. A boom may pertain-to an era.Logical formLearned from12 sentences. Leadership can be in an era.Logical formLearned from12 sentences. An era may come to a halt.Logical formLearned from12 sentences. A view may show an era.Logical formLearned from12 sentences. A new era may be launched.Logical formLearned from12 sentences. An era can be in a world-city.Logical formLearned from12 sentences. A first millennium may pertain-to an era.Logical formLearned from12 sentences. An epoch may pertain-to an era.Logical formLearned from12 sentences. Challenges can be in an era.Logical formLearned from12 sentences. A new era can be constituted-of-or-filled-with (budget surpluses).Logical formLearned from12 sentences.