question: Did a screenwriter that M2 was executive produced by and M1 was edited by direct M3 and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.writer .
  ?x0 ns:film.director.film M3 .
  ?x0 ns:film.director.film M4 .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.producer.films_executive_produced M2
  }