question: Were M2 and M4 directed by a film producer , executive produced by a cinematographer , and written by M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.cinematographer .
  ?x1 a ns:film.producer .
  M2 ns:film.film.directed_by ?x1 .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.written_by M3 .
  M4 ns:film.film.directed_by ?x1 .
  M4 ns:film.film.executive_produced_by ?x0 .
  M4 ns:film.film.written_by M3
  }