question: Was a star of M3 a Swedish film producer that wrote M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:film.actor.film/ns:film.performance.film M3 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:people.person.nationality ns:m.0d0vqn
  }