Partisan is a 2015 Australian film directed by Ariel Kleiman. The film stars Vincent Cassel as Gregori, a cult leader. The feature marks Kleiman's directorial debut. Kleiman wrote the film with his girlfriend Sarah Cyngler. It premiered at the 2015 Sundance Film Festival.

Can we draw the following conclusion?
Sarah Cyngler's boyfriend that she wrote the film with was Vincent Casse

Pick your answer from:
* Yes.
* It's impossible to say.
* No.
No