Did M1 , M2 , M3 , M4 , M5 , M6 , and M7 employ a film producer
SELECT count(*) WHERE {
?x0 a ns:film.producer .
M1 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M4 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M5 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M6 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M7 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}