Rebecca: What's green, hangs on the wall, and whistles?
Samuel: I don't know -- what is green, hangs on the wall, and whistles?
Rebecca: A herring.
Samuel: But ... a herring isn't green!
Rebecca: Nu, so you could paint it green.
Samuel: But a herring doesn't hang on the wall!
Rebecca: Nu, so you could hang it on the wall.
Samuel: But a herring doesn't whistle!
Rebecca: Nu, so a herring doesn't whistle.
Samuel: I know, Bubele. I just put that in to make the riddle harder.