Was M0 a Canadian American screenwriter that was employed by M2
SELECT count(*) WHERE {
M0 a ns:film.writer .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M0 ns:people.person.nationality ns:m.09c7w0 .
M0 ns:people.person.nationality ns:m.0d060g
}