Was a film producer founded by M1 and M2 and founded by M3 's star
SELECT count(*) WHERE {
?x0 a ns:film.producer .
?x0 ns:organization.organization.founders ?x1 .
?x0 ns:organization.organization.founders M1 .
?x0 ns:organization.organization.founders M2 .
?x1 ns:film.actor.film/ns:film.performance.film M3
}