Was M5 edited by a film editor that M1 , M2 , M3 , and M4 employed and edited by M6 and M7
SELECT count(*) WHERE {
?x0 a ns:film.editor .
?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 .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
M5 ns:film.film.edited_by ?x0 .
M5 ns:film.film.edited_by M6 .
M5 ns:film.film.edited_by M7
}