question: Did M1 executive produce M3 and M4 , edit M0 's sequel , and edit M2
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel M0 .
  M1 ns:film.editor.film ?x0 .
  M1 ns:film.editor.film M2 .
  M1 ns:film.producer.films_executive_produced M3 .
  M1 ns:film.producer.films_executive_produced M4
  }