question: What actor whose country of nationality employed M2 and M3 wrote M1
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:people.person.nationality ?x1 .
  ?x1 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
  ?x1 ns:business.employer.employees/ns:business.employment_tenure.person M3
  }