---
    admin_level: 
        "2": "country"
        "3": "country_region"
        "4": "state"
        "6": "state_district"
        "8": "city"
        "10": "suburb"

    overrides:
        id:
            relation:
                # Istanbul, coterminous with the city
                "223474": "city"

        contained_by:
            relation:
                # Istanbul
                "223474":
                    admin_level:
                        "6": "city_district"
                        "8": "suburb"

                # Ankara
                "223422":
                    admin_level:
                        "6": "city_district"