Did M5 employ a Japanese person that M1 , M2 , and M3 were written by
SELECT count(*) WHERE {
?x0 a ns:people.person .
?x0 ns:film.writer.film M1 .
?x0 ns:film.writer.film M2 .
?x0 ns:film.writer.film M3 .
?x0 ns:people.person.nationality ns:m.03_3d .
M5 ns:business.employer.employees/ns:business.employment_tenure.person ?x0
}