Did a Chinese cinematographer of M3 play M1 and M2
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.character M1 .
?x0 ns:film.actor.film/ns:film.performance.character M2 .
?x0 ns:film.cinematographer.film M3 .
?x0 ns:people.person.nationality ns:m.0d05w3
}