question: Did M1 , M5 , and M6 executive produce a film and write M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  M1 ns:film.producer.films_executive_produced ?x0 .
  M1 ns:film.writer.film M2 .
  M1 ns:film.writer.film M3 .
  M1 ns:film.writer.film M4 .
  M5 ns:film.producer.films_executive_produced ?x0 .
  M5 ns:film.writer.film M2 .
  M5 ns:film.writer.film M3 .
  M5 ns:film.writer.film M4 .
  M6 ns:film.producer.films_executive_produced ?x0 .
  M6 ns:film.writer.film M2 .
  M6 ns:film.writer.film M3 .
  M6 ns:film.writer.film M4
  }