query: SELECT ?sample ?ct ?qt (?ct >= ?qt as ?complete)
  WHERE
  {
      {   SELECT ?sample (COUNT(DISTINCT ?person) as ?ct)
          WHERE
          {
              hint:Query hint:optimizer "None".
              VALUES ?sample { wd:Q128910 wd:Q775407 wd:Q2917717 }
              ?sample wdt:P180 ?person . 
              ?person wdt:P31*/wdt:P279* wd:Q215627
          }
          GROUP BY ?sample
      }
      ?sample wdt:P369 / wdt:P1181 ?qt 
  }    