question: Was a actor a film producer that M2 and M3 were directed by and were edited by
query: SELECT count(*) WHERE {
  ?x0 a ns:film.actor .
  ?x0 a ns:film.producer .
  ?x0 ns:film.director.film M2 .
  ?x0 ns:film.director.film M3 .
  ?x0 ns:film.editor.film M2 .
  ?x0 ns:film.editor.film M3
  }