question: Was a Spanish art director of M1 a film 's art director
query: SELECT count(*) WHERE {
  ?x0 ns:film.film_art_director.films_art_directed ?x1 .
  ?x0 ns:film.film_art_director.films_art_directed M1 .
  ?x0 ns:people.person.nationality ns:m.06mkj .
  ?x1 a ns:film.film
  }