query: SELECT ?item ?itemLabel
  WHERE
  {
  	?item wdt:P31 wd:Q476028 .
    	?item wdt:P17 wd:Q21 .
  	FILTER NOT EXISTS { ?item wdt:P462 [] . }
  	?article schema:about ?item . ?article schema:isPartOf <https://el.wikipedia.org/>
    	SERVICE wikibase:label { bd:serviceParam wikibase:language "el" }
  }