Did M1 star M2 , star M3 , M4 , and M5 , and star M0 's producer
SELECT count(*) WHERE {
?x0 ns:film.producer.film|ns:film.production_company.films M0 .
M1 ns:film.film.starring/ns:film.performance.actor ?x0 .
M1 ns:film.film.starring/ns:film.performance.actor M2 .
M1 ns:film.film.starring/ns:film.performance.actor M3 .
M1 ns:film.film.starring/ns:film.performance.actor M4 .
M1 ns:film.film.starring/ns:film.performance.actor M5
}