What person whose employer employed and was founded by M3 and M4 was a Canadian cinematographer
SELECT DISTINCT ?x0 WHERE {
?x0 a ns:film.cinematographer .
?x0 a ns:people.person .
?x0 ns:people.person.employment_history/ns:business.employment_tenure.company ?x1 .
?x0 ns:people.person.nationality ns:m.0d060g .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person M3 .
?x1 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
?x1 ns:organization.organization.founders M3 .
?x1 ns:organization.organization.founders M4
}