question: Did M3 and M5 employ M0 's Canadian sibling , employ M4 , and employ a employee of M2
query: SELECT count(*) WHERE {
  ?x0 ns:people.person.nationality ns:m.0d060g .
  ?x0 ns:people.person.sibling_s/ns:people.sibling_relationship.sibling|ns:fictional_universe.fictional_character.siblings/ns:fictional_universe.sibling_relationship_of_fictional_characters.siblings M0 .
  ?x1 ns:people.person.employment_history/ns:business.employment_tenure.company M2 .
  FILTER ( ?x0 != M0 ) .
  M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
  M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  M3 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
  M5 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
  M5 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  M5 ns:business.employer.employees/ns:business.employment_tenure.person M4
  }