---
    admin_level: 
        "2": "country"
        "4": "country_region"
        "6": "state"
        "7": "state_district"
        "8": "city"
        "9": "city"

    overrides:
        id:
            relation:
                # Brussels-Capital Region
                "54094": "state"

        contained_by:
            relation:
                # Antwerpen
                "59518":
                    admin_level:
                        "9": "city_district"