question: Were M1 , M4 , M5 , and M6 written by a film 's director , executive produced by M2 , and written by M3
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film ?x1 .
  ?x1 a ns:film.film .
  M1 ns:film.film.executive_produced_by M2 .
  M1 ns:film.film.written_by ?x0 .
  M1 ns:film.film.written_by M3 .
  M4 ns:film.film.executive_produced_by M2 .
  M4 ns:film.film.written_by ?x0 .
  M4 ns:film.film.written_by M3 .
  M5 ns:film.film.executive_produced_by M2 .
  M5 ns:film.film.written_by ?x0 .
  M5 ns:film.film.written_by M3 .
  M6 ns:film.film.executive_produced_by M2 .
  M6 ns:film.film.written_by ?x0 .
  M6 ns:film.film.written_by M3
  }