query: SELECT ?item ?id
  WHERE 
  {
    ?item wdt:P21 wd:Q6581072 . 
    ?item wdt:P5008 wd:Q64759223.
    ?item wdt:P31 wd:Q5.
    OPTIONAL { ?item wdt:P27 ?_country_of_citizenship. }
  }
  ORDER BY xsd:integer(?id)
  LIMIT 2500