Was M2 produced by a Mexican screenwriter and edited by M3 , M4 , M5 , M6 , and M7
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:people.person.nationality ns:m.0b90_r .
M2 ns:film.film.edited_by M3 .
M2 ns:film.film.edited_by M4 .
M2 ns:film.film.edited_by M5 .
M2 ns:film.film.edited_by M6 .
M2 ns:film.film.edited_by M7 .
M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}