There's also a variation closer to home that goes:
A North Korean, South Korean and Japanese enters a restaurant
and a waiter tells them: I'm sorry, but we're out of meat.
Confused, the jap asks: Excuse me, but what is no more?
Perplexed, the S korean looks at the jap and asks: What is
sorry and excuse me?
Confounded, the N Korean asks: What is meat?