Were M4 and M5 produced by a production company that M1 , M2 , and M3 founded
SELECT count(*) WHERE {
?x0 a ns:film.production_company .
?x0 ns:organization.organization.founders M1 .
?x0 ns:organization.organization.founders M2 .
?x0 ns:organization.organization.founders M3 .
M4 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
M5 ns:film.film.produced_by|ns:film.film.production_companies ?x0
}