What did a Mexican screenwriter 's employer produce
SELECT DISTINCT ?x0 WHERE {
?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
?x2 a ns:film.writer .
?x2 ns:people.person.nationality ns:m.0b90_r
}