question: What character wrote , directed , and executive produced a film
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:fictional_universe.fictional_character .
  ?x0 ns:film.director.film ?x1 .
  ?x0 ns:film.producer.films_executive_produced ?x1 .
  ?x0 ns:film.writer.film ?x1 .
  ?x1 a ns:film.film
  }