question: Was M0 a Canadian actor that M2 and M3 were edited by and starred
query: SELECT count(*) WHERE {
  M0 a ns:film.actor .
  M0 ns:film.actor.film/ns:film.performance.film M2 .
  M0 ns:film.actor.film/ns:film.performance.film M3 .
  M0 ns:film.editor.film M2 .
  M0 ns:film.editor.film M3 .
  M0 ns:people.person.nationality ns:m.0d060g
  }