question: Was M2 executive produced by a French art director and directed by M3 and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 ns:people.person.nationality ns:m.0f8l9c .
  M2 ns:film.film.directed_by M3 .
  M2 ns:film.film.directed_by M4 .
  M2 ns:film.film.executive_produced_by ?x0
  }