question: Was a film producer a art director that M2 , M3 , and M4 were edited and written by
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 a ns:film.producer .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.editor.film M3 .
  ?x0 ns:film.editor.film M4 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:film.writer.film M3 .
  ?x0 ns:film.writer.film M4
  }