User blog comment:Turnertang/Super Blog!!!/@comment-1284182-20091203002206

The joke was like this

Krusty: Why do phonebooks have white and yellow?

Lisa: Ones residential and ones buisness listings.

Krusty: uhhh... What will they think of next? Blue pages?

Marge: They have those. They're goverment listings.

And You're welcome Sprinklemist