question: Did a Spanish film editor edit a film , edit M1 , and edit M2 , M3 , and M4
query: SELECT count(*) WHERE {
  ?x0 a ns:film.editor .
  ?x0 ns:film.editor.film ?x1 .
  ?x0 ns:film.editor.film M1 .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.editor.film M3 .
  ?x0 ns:film.editor.film M4 .
  ?x0 ns:people.person.nationality ns:m.06mkj .
  ?x1 a ns:film.film
  }