query: SELECT ?item ?itemLabel ?creator ?creatorLabel WHERE 
  { 
    ?item wdt:P136 wd:Q557141 . 
    ?item wdt:P131 ?sub0 . 
    ?sub0 (wdt:P131)* wd:Q23939248 .
    ?item wdt:P170 ?creator .
    ?creator wdt:P21 wd:Q6581072 .
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }