knows where … is
Tom sabe dónde está escondido el dinero.
Tom knows where the money is hidden.
Tom no sabe dónde está Mary.
Tom doesn't know where Mary is.
Tom cree que Mary sabe dónde está John.
Tom believes Mary knows where John is.
Nadie sabe dónde está Vanuatu, por eso quiero ir allí, para estar tranquilo.
No one knows where Vanuatu is, which is why I want to go there, to be at peace.
It is unknown where it is.