question: Was M6 's producer a Spanish screenwriter that executive produced M2 , M3 , and M4 and edited M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.producer.films_executive_produced M2 .
  ?x0 ns:film.producer.films_executive_produced M3 .
  ?x0 ns:film.producer.films_executive_produced M4 .
  ?x0 ns:film.producer.film|ns:film.production_company.films M6 .
  ?x0 ns:people.person.nationality ns:m.06mkj
  }