question: What was written by M0 , M1 , M2 , and M3 and produced by a screenwriter that executive produced M5 and M6
query: SELECT DISTINCT ?x0 WHERE {
  ?x0 ns:film.film.produced_by|ns:film.film.production_companies ?x1 .
  ?x0 ns:film.film.written_by M0 .
  ?x0 ns:film.film.written_by M1 .
  ?x0 ns:film.film.written_by M2 .
  ?x0 ns:film.film.written_by M3 .
  ?x1 a ns:film.writer .
  ?x1 ns:film.producer.films_executive_produced M5 .
  ?x1 ns:film.producer.films_executive_produced M6
  }