Was M3 executive produced by a Mexican screenwriter and edited by a person
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:people.person.nationality ns:m.0b90_r .
?x1 a ns:people.person .
M3 ns:film.film.edited_by ?x1 .
M3 ns:film.film.executive_produced_by ?x0
}