What did a Canadian person employed by M1 and M2 and employed by M3 found
SELECT DISTINCT ?x0 WHERE {
?x0 ns:organization.organization.founders ?x1 .
?x1 a ns:people.person .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M1 .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M3 .
?x1 ns:people.person.nationality ns:m.0d060g
}