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