Was a Mexican film editor that a sequel of a film was produced by and M4 was produced by M1
SELECT count(*) WHERE {
?x0 ns:film.film.prequel ?x1 .
?x1 a ns:film.film .
M1 a ns:film.editor .
M1 ns:film.producer.film|ns:film.production_company.films ?x0 .
M1 ns:film.producer.film|ns:film.production_company.films M4 .
M1 ns:people.person.nationality ns:m.0b90_r
}