Were M2 and M4 founded by a person , founded by M1 's producer and writer , and founded by M3
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x1 ns:film.producer.film|ns:film.production_company.films M1 .
?x1 ns:film.writer.film M1 .
M2 ns:organization.organization.founders ?x0 .
M2 ns:organization.organization.founders ?x1 .
M2 ns:organization.organization.founders M3 .
M4 ns:organization.organization.founders ?x0 .
M4 ns:organization.organization.founders ?x1 .
M4 ns:organization.organization.founders M3
}