Were M1 and M2 founded by a film 's prequel 's sequel 's star
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film ?x1 .
?x1 ns:film.film.prequel ?x2 .
?x2 ns:film.film.sequel ?x3 .
?x3 a ns:film.film .
M1 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders ?x0
}