question: Were M1 and M4 executive produced by M2 and M3 and directed by a film 's director and writer
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film ?x1 .
  ?x0 ns:film.writer.film ?x1 .
  ?x1 a ns:film.film .
  M1 ns:film.film.directed_by ?x0 .
  M1 ns:film.film.executive_produced_by M2 .
  M1 ns:film.film.executive_produced_by M3 .
  M4 ns:film.film.directed_by ?x0 .
  M4 ns:film.film.executive_produced_by M2 .
  M4 ns:film.film.executive_produced_by M3
  }