question: Which Chinese director of M2 , M3 , and M4 was a parent of M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.director.film M2 .
  ?x0 ns:film.director.film M3 .
  ?x0 ns:film.director.film M4 .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child M1 .
  ?x0 ns:people.person.nationality ns:m.0d05w3
  }