A: You're yawning.
B: I sure am.
A: You should go to bed.
B: I will as soon as I finish this article.
A: What are you reading?
B: It's about crime in Los Angeles.
A: What does it say?
B: The mayor says the crime rate is going down.
A: Then why does everyone lock their doors?
B: I guess they haven't read this article.
A: No one believes that the crime rate is going down.
B: Maybe the mayor is just talking about his own neighborhood.