how to get another element of same parent in xslt?

[Apwogadhms]

\[code\]<name><last-name>aaa</last-name><first-name>bbb</first-name></name>\[/code\]template is:\[code\]<xsl:template match="last-name"> display first-name</xsl:template>\[/code\]How to do this?thanks in advance.