question: What Canadian female film producer was M4 's British parent
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child M4 .
  ?x0 ns:people.person.gender ns:m.02zsn .
  ?x0 ns:people.person.nationality ns:m.07ssc .
  ?x0 ns:people.person.nationality ns:m.0d060g
  }