grouping headers

Sorry for the subject line, I couldn't think of anything better :-) I'm
trying to do the following:

I have something like this xml:

<people>
    <person>
        <city>Amsterdam</city>
        <name>John Doe</name>
    </person>

    <person>
        <city>Amsterdam</city>
        <name>Jane Doe</name>
    </person>

    <person>
        <city>London</city>
        <name>Jim Doe</name>
    </person>
</people>

And would like this result in html:

Amsterdam
John Doe
Jane Doe

London
Jim Doe

I hope I'm making myself clear, I searched the archives for an answer but I
don't really know what I'm looking for...




 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list