query: SELECT ?cc (COUNT(DISTINCT ?child) AS ?number) {
    ?child wdt:P31 wd:Q5 ; # Looking for real humans and not fictional ones
           wdt:P39/wdt:P279* wd:Q83307 ;
           (wdt:P22|wdt:P25) [wdt:P39/wdt:P279* wd:Q83307] ;
           wdt:P27/wdt:P901 ?cc
  }
  GROUP BY ?cc
  ORDER BY DESC(?number)