query: SELECT DISTINCT ?item ?itemLabel 
  WHERE
  {
  	?item wdt:P31 wd:Q476028 .
    	?item wdt:P17 wd:Q21 .
  	FILTER NOT EXISTS { ?item wdt:P576 [] . }
  	FILTER NOT EXISTS { ?item p:P856 ?claim . ?claim pq:P407 ?lang } 
    	SERVICE wikibase:label { bd:serviceParam wikibase:language "el" }
  }