obviously he didnt search for long enough, in the yahoo pipe on each module there is a "?" just click on it and check some exemple there is one module source to parse webpage there is some nice exemple how to parse a normal page and build your own rss flux this one is a good start to understand how to manipule rss flux with yahoo pipe.
You will have to rework the flux to pop the thing you want .
There is even less complicated than the regex which is substring function ... etc etc there is a ton of exemple on yahoo pipe...
Dont think yahoo pipe is sometime the easiest way to do something, take it like a prototyping tool sort of proof of concept one...
i wont have time to explain you that in detail. if you are looking for regex there is a regex library on
regexlib.com/DisplayPatterns.aspx