question: Did a French art director produce M2 and M3 and produce M4 , M5 , and M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film_art_director .
  ?x0 ns:film.producer.film|ns:film.production_company.films M2 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M3 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M4 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M5 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M6 .
  ?x0 ns:people.person.nationality ns:m.0f8l9c
  }