question: Which Italian film director whose child directed M3 and M4 did M1 employ
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.director .
  ?x0 ns:people.person.children|ns:fictional_universe.fictional_character.children|ns:organization.organization.child/ns:organization.organization_relationship.child ?x1 .
  ?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x0 ns:people.person.nationality ns:m.03rjj .
  ?x1 ns:film.director.film M3 .
  ?x1 ns:film.director.film M4
  }