"Yes, the championship game is this Saturday."
Translation:ʻAe, aia nō ka hoʻokūkū kahului i kēia Pōʻaono.
The indicator is the "Yes" at the start. Consider these slightly different dialogs:
Are you going to watch the game?
"Yes, we are (indeed) going to watch the game."
As opposed to:
What are you doing this weekend?
"We are going to watch the game."
Sometimes you might be able to recognize an emphasis when the context is a significant event, such as winning a big game.
They do the same thing with anei. The use of anei requires a yes or no answer only, but in a polite way.