who
De verdad que no sé quién eres tú y dónde vives.
I really don't know who you are or where you live.
— Hermano (1997)
No sé quién está al frente del negocio.
I don't know who's in charge of the business.
I don't know who made the cake.
I don't know who killed him.
No sé quién salió de aquel sótano, pero no fue Dave.
I don't know who came out of that basement, but it wasn't Dave.
— Mystic River (2003)
Alguien me disparó, pero no sé quién.
Someone shot me, but I don't know who.
— Por un puñado de dólares (1964)
I don't know who should do it.
No sé quién ganó el campeonato.
I don't know who won the championship.