I'm sure you're familiar with the "cut" operator, Abigail, but most of the other people here will find it largely underdocumented. So I dare to feel free to point towards the draft of a book on regular expressions that the same perlmonk is writing, who also wrote YAPE::Regex::Explain (actually, he wrote the whole YAPE suite).

I personally like the draft of book very much, and so, I like to plug it whenever I can. So here's the URL: http://japhy.perlmonk.org/book/. Check out chapter 8 for the "cut" operator — every chapter is a separate download, roughly around 12 pages each, either in MS Word or in PDF format. Recommended.