question: Did M1 direct , write , and edit a film 's prequel and sequel
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.prequel ?x1 .
  ?x0 ns:film.film.sequel ?x1 .
  ?x1 a ns:film.film .
  M1 ns:film.director.film ?x0 .
  M1 ns:film.editor.film ?x0 .
  M1 ns:film.writer.film ?x0
  }