Who was employed by M1 and was employed by M2 's producer 's country of nationality
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:people.person .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x1 ^ns:people.person.nationality ?x2 .
?x2 ns:film.producer.film|ns:film.production_company.films M2
}