Was M3 employed by a production company that M1 founded and M2 founded and employed by M4
SELECT count(*) WHERE {
?x0 a ns:film.production_company .
?x0 ns:organization.organization.founders M1 .
?x0 ns:organization.organization.founders M2 .
M3 ns:people.person.employment_history/ns:business.employment_tenure.company ?x0 .
M3 ns:people.person.employment_history/ns:business.employment_tenure.company M4
}