Was a country of nationality of a employee of M0 's writer and producer M1
SELECT count(*) WHERE {
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x1 ns:film.producer.film|ns:film.production_company.films M0 .
?x1 ns:film.writer.film M0 .
M1 ^ns:people.person.nationality ?x0
}