A backwater may pertain-to an empire.Logical formLearned from10 sentences. An empire can be unwieldy.Logical formLearned from10 sentences. Persons may seek an empire.Logical formLearned from10 sentences. Rulers may pertain-to an empire.Logical formLearned from10 sentences. An empire may thrive.Logical formLearned from10 sentences. A founder may pertain-to a (business empire).Logical formLearned from10 sentences. An empire can be to the north.Logical formLearned from10 sentences. Empires can be in a continent.Logical formLearned from10 sentences. An empire may last.Logical formLearned from10 sentences. A male may hold an empire.Logical formLearned from10 sentences. A male may manage an empire.Logical formLearned from10 sentences. An invader may overthrew an empire.Logical formLearned from10 sentences. A male may preside over a break-up of a British empire.Logical formLearned from10 sentences. Voyages may spur a growth of a (colonial empire).Logical formLearned from10 sentences. An empire may undergo a survey.Logical formLearned from10 sentences.