query: SELECT  ?item ?collectie 
    WITH {SELECT ?item  ?collectie {
    ?item wdt:P6379 ?collectie.
    ?item wdt:P31/(wdt:P279)* wd:Q4830453.
    ?item wdt:P17 wd:Q55.
    FILTER NOT EXiSTS {
     ?item wdt:P856 ?website
    }
    FILTER NOT EXiSTS {
     ?item wdt:P576 ?opheffing
    }
  }
  } AS %items
  WHERE {
  INCLUDE %items
    ?sitelink schema:about ?item .
    ?sitelink schema:inLanguage ?lang .   
    ?sitelink schema:isPartOf [ wikibase:wikiGroup "wikipedia" ] .
  }