What is the nationality of the director of a film that premiered at the Sundance Film Festival?
Mudbound (film): Mudbound is a 2017 period drama film directed by Dee Rees, with a script written by Virgil Williams based on the novel "Mudbound" by Hillary Jordan. Mudbound (film):  It premiered at the 2017 Sundance Film Festival on January 21, 2017.
i don't know