RSS Feed XMLDataSource Filter RSS Items

Given a standard RSS feed being consumed in an XMLDataSource, what would be the best way of filtering the RSS feed to show only items where the RSS feed item description contains a particular term?

e.g I wish to filter the following RSS feed where the description contains a certain team name say 'Liverpool'

http://pipes.yahoo.com/pipes/pipe.run?_id=9dae054b43e8ded5a10a659c39c72f49&_render=rss

My code to set the XML datasource is as follows:

 HomeDataSource.DataFile = "http://pipes.yahoo.com/pipes/pipe.run?_id=9dae054b43e8ded5a10a659c39c72f49&_render=rss";        HomeDataSource.XPath = "rss/channel/item";        HomeListView.DataSourceID = "HomeDataSource";        HomeListView.DataBind();

The output of the above code is displayed using the following source code:

<asp:ListView ID="HomeListView" runat="server"><LayoutTemplate><ul><asp:PlaceHolder ID="itemPlaceHolder" runat="server"></asp:PlaceHolder></ul></LayoutTemplate><ItemTemplate><li><a target="_blank" href="<%#XPath("link")%>"><%#XPath("title")%></a></li></ItemTemplate></asp:ListView>

Many thanks in advance for any advice offered.