A person may recall an era.Logical formLearned from9 sentences. A propaganda may pertain-to an era.Logical formLearned from9 sentences. An advent may pertain-to a modern era.Logical formLearned from9 sentences. Books may pertain-to an era.Logical formLearned from9 sentences. A precedent can be in an era.Logical formLearned from9 sentences. Events can be in an era.Logical formLearned from9 sentences. A (turning point) can be in an era.Logical formLearned from9 sentences. A new era can be in transportation.Logical formLearned from9 sentences. A new era can be constituted-of-or-filled-with (health care).Logical formLearned from9 sentences. Variety can be constituted-of-or-filled-with historical eras.Logical formLearned from9 sentences. An era can be interstate.Logical formLearned from9 sentences. A microprocessor may pertain-to an era.Logical formLearned from9 sentences. A transition can be to a new era.Logical formLearned from9 sentences. A new era can be in collaboration.Logical formLearned from9 sentences. An art may pertain-to an era.Logical formLearned from9 sentences.