question: Were M4 and M5 executive produced by M0 's star and executive produced by a Mexican executive producer of M1 and M2
query: SELECT count(*) WHERE {
  ?x0 ns:film.actor.film/ns:film.performance.film M0 .
  ?x1 ns:film.producer.films_executive_produced M1 .
  ?x1 ns:film.producer.films_executive_produced M2 .
  ?x1 ns:people.person.nationality ns:m.0b90_r .
  M4 ns:film.film.executive_produced_by ?x0 .
  M4 ns:film.film.executive_produced_by ?x1 .
  M5 ns:film.film.executive_produced_by ?x0 .
  M5 ns:film.film.executive_produced_by ?x1
  }