question: Was a film written by M1 and executive produced by a film producer edited by M2 and M3
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.edited_by M2 .
  ?x0 ns:film.film.edited_by M3 .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x0 ns:film.film.written_by M1 .
  ?x1 a ns:film.producer
  }