Did M2 employ a film producer , employ M3 , employ M4 , and employ a person
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x1 a ns:film.producer .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M4
}