I think that the Area class refers to the s4city:AdministrativeArea one, which is already defined in SAREF4WEAR. So I remove it.

Also, the capacity is the capacity of a Facility (A place, amenity, or piece of equipment provided for a particular purpose.), but not of an Administrative area (An administrative division, unit, entity, area or region, also referred to as a subnational entity, constituent unit, or country subdivision, is a portion of a country or other region delineated for the purpose of administration.).