A: What do we need to buy? B: Let me look at our list. A: I know that we need milk. B: Nonfat. A: Of course. What else? B: We need cheese, bread, and ham. A: What kind of cheese? B: Swiss. A: Of course, the cheese with holes in it. B: I never used to buy Swiss cheese. A: Why not? B: I didn't want to pay for the holes.