You have only to name the second emperor of the Ming dynasty, that's all.
10 seconds sound clip from the Champagne for Caesar movie soundboard.
You can hear this line at 00:28:06 in the DVD version of the movie.
Quote context
[...]
- How're you feeling tonight, kind of nervous?
- Why should I be nervous? It's your money, you're losing it. I'm only winning it.
- I've seen tonight's question. You will be sorry...
- Suppose you stop all this nonsense and just ask me the question Hmm?
- You have only to name the second emperor of the Ming dynasty, that's all.
- Of course, it was Zhu Yunwen, he was dethroned by his uncle who became the third emperor.
- Strange enough, the third Emperor had three names: Zhu Di, Cheng Zhu...
- That's enough... He wins again!
- Mr.Bottomley here's your check for $40,000.
[...]