Did M4 employ a American editor of M1 , M2 , and M3 and employ M5
SELECT count(*) WHERE {
?x0 ns:film.editor.film M1 .
?x0 ns:film.editor.film M2 .
?x0 ns:film.editor.film M3 .
?x0 ns:people.person.nationality ns:m.09c7w0 .
M4 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M4 ns:business.employer.employees/ns:business.employment_tenure.person M5
}