question: Did a actor edit M1 and M2 , edit M3 , M4 , M5 , and M6 , and direct M7
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 ns:film.director.film M7 .
  ?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:film.editor.film M5 .
  ?x0 ns:film.editor.film M6
  }