Task: Text Simplification
Input (English): the fourth and fifth digits designate the number of the urban area -lrb- in a district-free city -rrb- or the district -lrb- in a city with districts -rrb-.
Output (English): the fourth and fifth digits identify the number of the urban area -lrb- in a district-free city -rrb- or the district -lrb- in a city with districts -rrb-.