query: #list of marvel movies
  SELECT ?movieLabel ?released_dateLabel (GROUP_CONCAT(DISTINCT ?directorLabel;separator=", ") AS ?directors) ?screenwriterLabel
  WHERE
  {
    ?movie wdt:P31 wd:Q11424.
    ?movie wdt:P179 wd:Q642878.
    ?movie wdt:P577 ?released_date.
    ?movie wdt:P57 ?director.
    ?movie wdt:P58 ?screenwriter.
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  GROUP BY ?movieLabel ?released_dateLabel ?screenwriterLabel