What was a country of nationality of a producer , executive producer , and writer of M0
SELECT DISTINCT ?x0 WHERE {
?x0 ^ns:people.person.nationality ?x1 .
?x1 ns:film.producer.films_executive_produced M0 .
?x1 ns:film.producer.film|ns:film.production_company.films M0 .
?x1 ns:film.writer.film M0
}