Were M1 , M2 , M3 , and M4 founded by a film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
M1 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders ?x0 .
M3 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders ?x0
}