Was M4 's editor and star employed by M0 and M1 and employed by M2 and M3
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.film M4 .
?x0 ns:film.editor.film M4 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M0 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M3
}