This example uses the Date Formatter and the Date Input module to determine the date corresponding to 9 years ago. The Pipe fetches data from the U.S. Geological Survey site and extracts a portion of the XML file using Fetch Data's Path to item list field.
Those items are then piped through a Filter module configured to match an XML element containing a year. That filter rule is wired to the Date Formatter module so that only those items matching our specified date (9 years ago) are sent to the Pipe Output.
Pipe Web Address: http://pipes.yahoo.com/pipes_team/jt2AY_NS3BG0IBEc9YS63A