>>Great, so you’ve passed the last quiz on strings.>>And Dave, I think you’ve explained strings better than I’ve ever seen it. I mean, I’ve always wondered what string theory’s all about. And, and physicists work really hard on it, and it looks so easy. So do you know what, what [CROSSTALK].>>I have no idea what the physicists are doing. They must have very long and complicated strings to deal with.>>I, I hear you can get a PhD in string theory, and now you know all about strings.>>Well, I think we know enough about strings now to move on to the part where we’re building the web crawler by extracting links from the page.