question: Did M4 star a Italian film producer that M1 and M2 were written by and starred
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 ns:film.actor.film/ns:film.performance.film M1 .
  ?x0 ns:film.actor.film/ns:film.performance.film M2 .
  ?x0 ns:film.writer.film M1 .
  ?x0 ns:film.writer.film M2 .
  ?x0 ns:people.person.nationality ns:m.03rjj .
  M4 ns:film.film.starring/ns:film.performance.actor ?x0
  }