The first one was "Mr Lisa goes to Washington"
Actually, in that episode Nelson is reading off an essay he has, for the regional Little Patriot Essay contest. It kinda goes something like this:
"So burn the flag if you must, but before you do, you better burn a few other things! You'd better burn your shirt and pants! Be sure to burn you TV and car! Oh yeah, and don't forget to burn your house! Because none of those things would exist without six red stripes, seven white stripes, and a hell of a lot of stars!"