rss from another rss ?

Hi guys ,

Let's say i've got one rss feed about sport in general , but i'm interested in news only about Messi ( the feed contains Mess's stuff and some unimportant news )

What is the easiest way to extract Messi's news and create another rss from it ? Is it possible at all ?

Or maybe is it any wordpress plugin , which can do that ?

my first suggestion would be to make a php script that parses the feed and then accepted a keyword query and then output the new rss feed... you may be able to use the SimplePie plugin to do this..