odkud

odkud

"From where."

In this sentence, 'odkud' is used as an interrogative adverb to ask about the origin or starting point of someone.

Odkud jsi?

Where are you from?

Here, 'odkud' introduces a subordinate clause expressing the origin of the next train's arrival.

Nevím, odkud přijde další vlak.

I don't know where the next train will come from.

In this context, 'odkud' functions as a subordinating connector specifying the source of knowledge about the song.

Vzpomněl si náhle, odkud zná tu písničku.

He suddenly remembered where he knows that song from.