query: SELECT ?item ?l ?l_el 
    (COUNT(DISTINCT ?p) as ?count)
    (SAMPLE(?p) as ?sample_p)
  {
      ?item wdt:P407 wd:Q9129 ;
            wdt:P31/wdt:P279? wd:Q202444 . 
      [] schema:about ?item ; schema:isPartOf <https://el.wikipedia.org/> ; schema:name ?l.
      ?item rdfs:label ?l_el. 
      FILTER (lang(?l_el) = "el"  
              && str(?l_el) != str(?l)
              && str(?l) != CONCAT( str(?l_el), " (όνομα)")
             ) 
      OPTIONAL { ?p wdt:P735 ?item }
  }
  GROUP BY ?item ?l ?l_el
  ORDER BY DESC(?count) ?item