- You were in love with him, weren't you?
- I don't know. How can you know a thing like that afterwards?

7 seconds sound clip from the The Third Man (1949) movie soundboard.

You can hear this line at 00:20:16.410 in the Blu-ray version of the movie.

Quote context

[...]

- Oh, there is some tea left.

- Had you known him some time?

- Yes.

- I wanted to talk to you. No, thank you. I wanted to talk to you about him.

- There's nothing really to talk about, is there? Nothing.

- Well, I saw you at the funeral.

- I'm so sorry. I didn't notice much.

- You were in love with him, weren't you?

- I don't know. How can you know a thing like that afterwards?

- I don't know anything any more, except I want to be dead, too. Some more tea? No. No tea.

- No. No tea. Would you like a cigarette?

- Oh, American. Thank you. I like them.

- I was talking to another friend of Harry's, a Baron Kurtz. Do you know him?

- No.

- He's got a little dog.

- Oh, yes, yes.

[...]