Was M0 a Canadian actor employed by M2 , M3 , and M4
SELECT count(*) WHERE {
M0 a ns:film.actor .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M4 .
M0 ns:people.person.nationality ns:m.0d060g
}