Did M3 star a film editor that M1 and M2 were played by , star M4 , and star M5
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:film.actor.film/ns:film.performance.character M1 .
?x0 ns:film.actor.film/ns:film.performance.character M2 .
M3 ns:film.film.starring/ns:film.performance.actor ?x0 .
M3 ns:film.film.starring/ns:film.performance.actor M4 .
M3 ns:film.film.starring/ns:film.performance.actor M5
}