question: Did a country of nationality of a child of a art director employ M0 and M1 and employ M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 ^ns:people.person.nationality ?x1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M0 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
  ?x1 ns:people.person.parents|ns:fictional_universe.fictional_character.parents|ns:organization.organization.parent/ns:organization.organization_relationship.parent ?x2 .
  ?x2 a ns:film.film_art_director
  }