Question: Are both directors of films Operation Mad Ball and Django (1966 Film) from the same country?
Sentence (from "Django (1966 film)"): Although the name is referenced in over thirty" sequels" from the time of the film's release until the early 1970s in an effort to capitalize on the success of the original, most of these films were unofficial, featuring neither Corbucci nor Nero.
Relevant evidence: No