question: Was M2 produced by M3 , M4 , M5 , M6 , and M7 and produced by a Mexican film editor
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x0 ns:people.person.nationality ns:m.0b90_r .
  M2 ns:film.film.produced_by|ns:film.film.production_companies ?x0 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies M3 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies M4 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies M5 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies M6 .
  M2 ns:film.film.produced_by|ns:film.film.production_companies M7
  }