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