question: Who was influenced by M1 , influenced by M2 's producer and writer , and influenced by M3 's Canadian sibling
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:people.person .
  ?x0 ns:influence.influence_node.influenced_by ?x1 .
  ?x0 ns:influence.influence_node.influenced_by ?x2 .
  ?x0 ns:influence.influence_node.influenced_by M1 .
  ?x1 ns:film.producer.film|ns:film.production_company.films M2 .
  ?x1 ns:film.writer.film M2 .
  ?x2 ns:people.person.nationality ns:m.0d060g .
  ?x2 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings M3 .
  FILTER ( ?x2 != M3 )
  }