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