query: SELECT DISTINCT ?item ?itemLabel
  WHERE
  {
  	{ ?item wdt:P31 wd:Q476028 } UNION { ?item wdt:P31 wd:Q15944511 }
    	?item wdt:P17 wd:Q29 .
  	FILTER NOT EXISTS { ?item wdt:P1448 [] . }
  	?article schema:about ?item . ?article schema:isPartOf <https://el.wikipedia.org/>
    	SERVICE wikibase:label { bd:serviceParam wikibase:language "el" }
  }