Was M1 a film producer that employed M3 , M4 , and M5 and was founded by a screenwriter
SELECT count(*) WHERE {
?x0 a ns:film.writer .
M1 a ns:film.producer .
M1 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
M1 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
M1 ns:business.employer.employees/ns:business.employment_tenure.person M5 .
M1 ns:organization.organization.founders ?x0
}