Frontiers may pertain-to an empire.Logical formLearned from13 sentences. A bulgarian empire can be in a century.Logical formLearned from13 sentences. An empire may rise to power.Logical formLearned from13 sentences. A male may rule an empire.Logical formLearned from13 sentences. Regent may pertain-to an empire.Logical formLearned from13 sentences. Empires can be maritime.Logical formLearned from13 sentences. An empire may pertain-to a century.Logical formLearned from13 sentences. A foundation may pertain-to a german empire.Logical formLearned from13 sentences. An empire may be flourished.Logical formLearned from13 sentences. Master may pertain-to an empire.Logical formLearned from13 sentences. An empire may be united.Logical formLearned from13 sentences. An empire may undergo a conversion.Logical formLearned from13 sentences. An empire can be dead.Logical formLearned from13 sentences. An empire can be peaceful.Logical formLearned from13 sentences. An end may pertain-to a (fashion empire).Logical formLearned from13 sentences.