Did M5 , M6 , and M7 produce a film that starred M1 , M2 , M3 , and M4
SELECT count(*) WHERE {
?x0 a ns:film.film .
?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 .
?x0 ns:film.film.starring/ns:film.performance.actor M4 .
M5 ns:film.producer.film|ns:film.production_company.films ?x0 .
M6 ns:film.producer.film|ns:film.production_company.films ?x0 .
M7 ns:film.producer.film|ns:film.production_company.films ?x0
}