question: What employer of M0 's writer was a country of nationality of M1 's employee
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ^ns:people.person.nationality ?x1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
  ?x2 ns:film.writer.film M0
  }