question: Was a film directed by M1 and M2 and executive produced by a cinematographer
query: SELECT count(*) WHERE {
  ?x0 a ns:film.film .
  ?x0 ns:film.film.directed_by M1 .
  ?x0 ns:film.film.directed_by M2 .
  ?x0 ns:film.film.executive_produced_by ?x1 .
  ?x1 a ns:film.cinematographer
  }