query: SELECT ?fn (COUNT(DISTINCT ?art) as ?ct)  (SAMPLE(?art) as ?item)
  WHERE
  {
      hint:Query hint:optimizer "None".
      ?art wdt:P1433 wd:Q665807 ; wdt:P31 wd:Q19389637 . 
      ?art wdt:P1476 ?title . 
      BIND( strbefore (str(?title), ",") as ?fn1 )
      BIND( IF(?fn1 = "", str(?title), ?fn1 ) as ?fn )  
  }
  GROUP BY ?fn
  HAVING ( ?ct > 4)
  ORDER BY DESC(?ct)