question: Was a Italian person that produced M3 a film producer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.producer .
  ?x0 a ns:people.person .
  ?x0 ns:film.producer.film|ns:film.production_company.films M3 .
  ?x0 ns:people.person.nationality ns:m.03rjj
  }