Stewart: May I help you?
Sera: Yes, please. I am looking for an umbrella.
Stewart: What’s your favorite color?
Sera: It’s black.
Stewart: Sorry, we have no black umbrella right now.
Here is a nice umbrella.
Sera: But this umbrella is yellow.
Stewart: That’s OK. Yellow umbrellas are very popular this year.
Allen: Excuse me?
Is this your umbrella?
Sera: No, it isn’t.
Allen: Are you sure?
Sera: Yes, I am sure.
That umbrella is brown, and my umbrella is yellow.