query: SELECT 
  	?item 
  	(COUNT(DISTINCT ?item1) as ?films) 
  	(ROUND(100 * COUNT(DISTINCT ?withdirector)/ ?films) as ?withdirector)
  	(ROUND(100 * COUNT(DISTINCT ?withyear)/ ?films) as ?withyear)
  	(ROUND(100 * COUNT(DISTINCT ?withtitle)/ ?films) as ?withtitle)
  	(ROUND(100 * COUNT(DISTINCT ?withoriginallanguage)/ ?films) as ?withoriginallanguage)
  	(strlen(?films) as ?group) 
  	(SUM(?ct) as ?statements) 
  	(ROUND( SUM(?ct) / ?films * 10)/10 as ?perfilm)
  	(ROUND(1000 * (COUNT(?item1) - ?films) / ?films )/10 as ?potentialerrorPCperfilm) 
  WHERE
  {
    	?item1 wdt:P31/wdt:P279* wd:Q11424 . 
    	?item1 wikibase:statements ?ct . 
    	?item1 wikibase:sitelinks 1 . 
    	OPTIONAL { ?item1 wdt:P57 [] . 	BIND(?item1 as ?withdirector) }
    	OPTIONAL { ?item1 wdt:P577 [] . BIND(?item1 as ?withyear) }  
    	OPTIONAL { ?item1 wdt:P1476 [] . BIND(?item1 as ?withtitle) }
    	OPTIONAL { ?item1 wdt:P364 [] . BIND(?item1 as ?withoriginallanguage) }  
    	[] schema:about ?item1; schema:isPartOf/^wdt:P856 ?item
  }  
  GROUP BY ?item
  HAVING (?films>5)
  ORDER BY DESC(?group) ASC(?perfilm)