An empire can be technological.Logical formLearned from37 sentences. An empire can be regional.Logical formLearned from37 sentences. An empire can be underground.Logical formLearned from37 sentences. A (publishing empire) may pertain-to a family.Logical formLearned from37 sentences. An empire may collapse in years.Logical formLearned from36 sentences. An existence may pertain-to an empire.Logical formLearned from36 sentences. A structure may pertain-to an empire.Logical formLearned from36 sentences. A city may pertain-to an empire.Logical formLearned from36 sentences. A male may expand an empire.Logical formLearned from36 sentences. An empire may undergo a building.Logical formLearned from36 sentences. A periphery may pertain-to an empire.Logical formLearned from36 sentences. An empire may pertain-to a king.Logical formLearned from36 sentences. Independence can be from an empire.Logical formLearned from36 sentences. Rulers may pertain-to an empire.Logical formLearned from36 sentences. An empire can be lucrative.Logical formLearned from36 sentences.