2 <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
3 <xsl:template match="/">
4 <xsl:copy-of select="site/open_auctions/open_auction[(not(bidder/following::bidder) or not(bidder/preceding::bidder)) or (bidder/following::bidder and bidder/preceding::bidder)]/interval"/>