Did M1 employ M2 , employ M3 , M4 , M5 , and M6 , and employ M0 's writer
SELECT count(*) WHERE {
?x0 ns:film.writer.film M0 .
M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M1 ns:business.employer.employees/ns:business.employment_tenure.person M2 .
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:business.employer.employees/ns:business.employment_tenure.person M6
}