question: Did a Canadian screenwriter 's employer employ a star of M2
query: SELECT count(*) WHERE {
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x1 .
  ?x0 ns:business.employer.employees/ns:business.employment_tenure.person ?x2 .
  ?x1 a ns:film.writer .
  ?x1 ns:people.person.nationality ns:m.0d060g .
  ?x2 ns:film.actor.film/ns:film.performance.film M2
  }