Did M3 star a film editor that M2 starred and M1 was executive produced by and star M4
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?x0 ns:film.actor.film/ns:film.performance.film M2 .
?x0 ns:film.producer.films_executive_produced M1 .
M3 ns:film.film.starring/ns:film.performance.actor ?x0 .
M3 ns:film.film.starring/ns:film.performance.actor M4
}