query: embed.html#SELECT
    ?cast ?castLabel ?castDescription 
    (COUNT(DISTINCT ?film) as ?count) 
    (SAMPLE(?film) as ?sample) (SAMPLE(?filmLabel) as ?sampleLabel) (SAMPLE(?filmDescription) as ?sampleDescription)
  WHERE
  {
    	?film wdt:P161 wd:Q51525 ; wdt:P161 ?cast .
      FILTER( ?cast != wd:Q51525 )
    	{ ?film wdt:P31/wdt:P279* wd:Q11424 } UNION { ?film wdt:P31 wd:Q5398426 }
      SERVICE wikibase:label
      {
        bd:serviceParam wikibase:language "en,en".
        ?cast rdfs:label ?castLabel . ?cast schema:description ?castDescription .
        ?film rdfs:label ?filmLabel . ?film schema:description ?filmDescription .                        
      }
  }
  GROUP BY ?cast ?castLabel ?castDescription
  ORDER BY DESC(?count) ?castLabel