Did M3 employ a editor of M1 and M2 and employ M0 's writer and star
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film M0 .
?x0 ns:film.writer.film M0 .
?x1 ns:film.editor.film M1 .
?x1 ns:film.editor.film M2 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1
}