question: Was M0 a Canadian film producer that executive produced M2 and M3
query: SELECT count(*) WHERE {
  M0 a ns:film.producer .
  M0 ns:film.producer.films_executive_produced M2 .
  M0 ns:film.producer.films_executive_produced M3 .
  M0 ns:people.person.nationality ns:m.0d060g
  }