question: Which Canadian screenwriter was influenced by M4 's writer and star , influenced by M1 , and influenced by M2
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x0 ns:influence.influence_node.influenced_by M2 .
  ?x0 ns:people.person.nationality ns:m.0d060g .
  ?x1 ns:film.actor.film/ns:film.performance.film M4 .
  ?x1 ns:film.writer.film M4
  }