question: What did M1 's Spanish writer produce and M0 produce
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies M0 .
  ?x1 ns:film.writer.film M1 .
  ?x1 ns:people.person.nationality ns:m.06mkj
  }