Did a film star M4 's executive producer and star M1 , M2 , and M3
SELECT count(*) WHERE {
?x0 a ns:film.film .
?x0 ns:film.film.starring/ns:film.performance.actor ?x1 .
?x0 ns:film.film.starring/ns:film.performance.actor M1 .
?x0 ns:film.film.starring/ns:film.performance.actor M2 .
?x0 ns:film.film.starring/ns:film.performance.actor M3 .
?x1 ns:film.producer.films_executive_produced M4
}