question: Was a screenwriter a Italian person that played M3 and played M4 , M5 , and M6
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 a ns:people.person .
  ?x0 ns:film.actor.film/ns:film.performance.character M3 .
  ?x0 ns:film.actor.film/ns:film.performance.character M4 .
  ?x0 ns:film.actor.film/ns:film.performance.character M5 .
  ?x0 ns:film.actor.film/ns:film.performance.character M6 .
  ?x0 ns:people.person.nationality ns:m.03rjj
  }