question: What was founded by a Canadian actor that was employed by M2 , M3 , and M4 and founded by M0
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:organization.organization.founders ?x1 .
  ?x0 ns:organization.organization.founders M0 .
  ?x1 a ns:film.actor .
  ?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.employment_history/ns:business.employment_tenure.company M4 .
  ?x1 ns:people.person.nationality ns:m.0d060g
  }