we don't know who
И самое интересное, что мы не знаем, кто радуется.
And the most interesting thing is that we don't know who's happy.
— Анатомия падения (2023)
Мы не знаем, кто всех пригласил.
We don't know who invited everyone.
We don’t know who the narrator is.
We don't know who he is.