Was a production company founded by M1 , M2 , and M3 and founded by a actor
SELECT count(*) WHERE {
?x0 a ns:film.production_company .
?x0 ns:organization.organization.founders ?x1 .
?x0 ns:organization.organization.founders M1 .
?x0 ns:organization.organization.founders M2 .
?x0 ns:organization.organization.founders M3 .
?x1 a ns:film.actor
}