question: Were M2 and M3 executive produced by , written by , and edited by a film editor that wrote M1
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x0 ns:film.writer.film M1 .
  M2 ns:film.film.edited_by ?x0 .
  M2 ns:film.film.executive_produced_by ?x0 .
  M2 ns:film.film.written_by ?x0 .
  M3 ns:film.film.edited_by ?x0 .
  M3 ns:film.film.executive_produced_by ?x0 .
  M3 ns:film.film.written_by ?x0
  }