question: What was produced by a art director that M3 's child employed and M2 employed and written by M0
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x0 ns:film.film.written_by M0 .
  ?x1 a ns:film.film_art_director .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company ?x2 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  ?x2 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent M3
  }