custom_attribute_values:                   [:name, :value],
      location_leaderships_attributes:           [:id, :leader_id,       :_destroy],
      capital_cities_relationships_attributes:   [:id, :capital_city_id, :_destroy],
      largest_cities_relationships_attributes:   [:id, :largest_city_id, :_destroy],
      notable_cities_relationships_attributes:   [:id, :notable_city_id, :_destroy],