question: Were M2 and M5 executive produced by a Mexican screenwriter , executive produced by M3 , and edited by M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  M2 ns:film.film.edited_by M4 .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.executive_produced_by M3 .
  M5 ns:film.film.edited_by M4 .
  M5 ns:film.film.executive_produced_by ?x0 .
  M5 ns:film.film.executive_produced_by M3
  }