Did M2 and M3 employ a screenwriter and employ a film editor
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x1 a ns:film.editor .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}