Did M2 employ M3 , M4 , and M5 and employ a Mexican screenwriter
SELECT count(*) WHERE {
?x0 a ns:film.writer .
?x0 ns:people.person.nationality ns:m.0b90_r .
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
}