question: Was M1 executive produced by M2 and written by a film 's director and editor
query: SELECT count(*) WHERE {
  ?x0 ns:film.director.film ?x1 .
  ?x0 ns:film.editor.film ?x1 .
  ?x1 a ns:film.film .
  M1 ns:film.film.executive_produced_by M2 .
  M1 ns:film.film.written_by ?x0
  }