question: Was a cinematographer a Mexican actor that M2 and M3 were executive produced by and M5 and M6 starred
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 a ns:film.cinematographer .
  ?x0 ns:film.actor.film/ns:film.performance.film M5 .
  ?x0 ns:film.actor.film/ns:film.performance.film M6 .
  ?x0 ns:film.producer.films_executive_produced M2 .
  ?x0 ns:film.producer.films_executive_produced M3 .
  ?x0 ns:people.person.nationality ns:m.0b90_r
  }