question: Who was influenced by a Canadian person that a director of M3 influenced and influenced M1 's art director
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:influence.influence_node.influenced ?x1 .
  ?x0 ns:influence.influence_node.influenced_by ?x2 .
  ?x1 ns:film.film_art_director.films_art_directed M1 .
  ?x2 a ns:people.person .
  ?x2 ns:influence.influence_node.influenced_by ?x3 .
  ?x2 ns:people.person.nationality ns:m.0d060g .
  ?x3 ns:film.director.film M3
  }