query: embed.html##Provincie Groningen
  #defaultView:Map
  SELECT ?Qvestiging ?QvestigingLabel ?coor ?partof ?partofLabel ?image ?layer WHERE {
  #SELECT ?s ?sLabel ?coor ?image ?layer WHERE { 
    
         ?Qvestiging (p:P31/ps:P31) wd:Q28564;wdt:P17 wd:Q55;
            wdt:P625 ?coor ;
            wdt:P361 ?partof ;
            OPTIONAL {?Qvestiging wdt:P18 ?image .}
    
  VALUES ?partof {
  wd:Q13928657 #Gron. Forum bieb
  wd:Q59940713 #St. Biblionet Groningen
                   }
  BIND( 
  IF(?partof = wd:Q13928657, "Groningen Stad",
  IF(?partof = wd:Q59940713, "Groningen Provincie",
               "")) AS ?layer).  
   
  SERVICE wikibase:label { bd:serviceParam wikibase:language "nl" }
  }
  ORDER BY ?QvestigingLabel ?partofLabel ?layer  
  
  