An era can be personal.Logical formLearned from14 sentences. Engineers can be during an era.Logical formLearned from14 sentences. A new era can be constituted-of-or-filled-with oil.Logical formLearned from14 sentences. An era can be constituted-of-or-filled-with films.Logical formLearned from14 sentences. An era may change a face of a country.Logical formLearned from14 sentences. Persons may enter an era of change.Logical formLearned from14 sentences. An era can be in relations.Logical formLearned from14 sentences. A problem may pertain-to an era.Logical formLearned from14 sentences. A new era can be in human (space flight).Logical formLearned from14 sentences. A new era can be in relations.Logical formLearned from14 sentences. Persons may return to an era.Logical formLearned from13 sentences. A period can be in an era.Logical formLearned from13 sentences. A country may begin a new era.Logical formLearned from13 sentences. A practice may pertain-to an era.Logical formLearned from13 sentences. Popular songs may pertain-to an era.Logical formLearned from13 sentences.