Did M2 and M6 employ a American editor of M1 , employ M3 , and employ M4 and M5
SELECT count(*) WHERE {
?x0 ns:film.editor.film M1 .
?x0 ns:people.person.nationality ns:m.09c7w0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
M2 ns:business.employer.employees/ns:business.employment_tenure.person M5 .
M6 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M6 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
M6 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
M6 ns:business.employer.employees/ns:business.employment_tenure.person M5
}