Was M2 directed by M3 and M4 and directed by a Mexican cinematographer
SELECT count(*) WHERE {
?x0 a ns:film.cinematographer .
?x0 ns:people.person.nationality ns:m.0b90_r .
M2 ns:film.film.directed_by ?x0 .
M2 ns:film.film.directed_by M3 .
M2 ns:film.film.directed_by M4
}