question: Was M1 a person that edited M0 's sequel 's prequel 's prequel and edited M3 , M4 , and M5
query: SELECT count(*) WHERE {
  ?x0 ns:film.film.sequel ?x1 .
  ?x1 ns:film.film.sequel ?x2 .
  ?x2 ns:film.film.prequel M0 .
  M1 a ns:people.person .
  M1 ns:film.editor.film ?x0 .
  M1 ns:film.editor.film M3 .
  M1 ns:film.editor.film M4 .
  M1 ns:film.editor.film M5
  }