Was M0 M1 's American British Canadian employee
SELECT count(*) WHERE {
M0 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
M0 ns:people.person.nationality ns:m.07ssc .
M0 ns:people.person.nationality ns:m.09c7w0 .
M0 ns:people.person.nationality ns:m.0d060g
}